There are two issues at play with the .bib entry shown in the question and the style you use (apa).
Use series+number
The first issue is that for biblatex the correct input for a series is slightly different from the usual input for most BibTeX styles. Where BibTeX uses the two fields series+volume biblatex has two possible combinations
series+number for loose series (usually consisting of many publications published by a variety of different authors over a long period of time) and
maintitle+volume for a tighter multi-volume publication (usually such a work involves fewer publications and the same or at least a more homogeneous set of authors over a shorter period of time).
With biblatex it is generally not a good idea to mix the two approaches.
The biblatex documentation explains the difference in 2.3.7 Publication and Journal Series, p. 37 as follows
The series field is used by traditional BibTeX styles both for the main title of a multi-volume work and for a publication series, i.e., a loosely related sequence of books by the same publisher which deal with the same general topic or belong to the same field of research. This may be ambiguous. This package introduces a maintitle field for multi-volume works and employs series for publication series only. The volume or number of a book in the series goes in the number field in this case.
This is also discussed in more detail in Omit Vol and Issue/No?, examples can be found at Biblatex: Local change in sorting order in references, BibLaTeX: how to reverse order of volume and series?, biblatex-dw bibliography formatting @incollection volume number after series name.
In your case then, the .bib file for biblatex should probably look like
@inproceedings{yh13cicling2,
author = {Haralambous, Yannis},
title = {New Perspectives in Sinographic Language Processing
Through the Use of Character Structure},
booktitle = {{CICLing} 2013: 14th International Conference on
Intelligent Text Processing and Computational Linguistics, {Samos}},
year = {2013},
pages = {201--217},
series = {Springer Lecture Notes in Computer Science},
number = {7816},
}
But APA style doesn't show series+number!
In your setup with biblatex-apa there is a second issue: biblatex-apa does not print the combination series+number at all in the bibliography. I don't have the APA manual at hand, but from reading https://github.com/plk/biblatex-apa/issues/15 and previous research it is my understanding that the APA guidelines (6th ed.) don't treat publication series extensively and only mention them once in a fairly ambiguous way (in the one example that involves a "series" in the APA manual we could also be talking about maintitle+volume; the output in the example certainly looks more like it).
If you have evidence that the APA guidelines require that series+number be shown in a different way, then you can – and should! – take this to the biblatex-apa bug tracker (cf. https://github.com/plk/biblatex-apa/issues/80). At the moment it is my understanding that you are not dead-set on following APA guidelines, but that you rather use biblatex-apa as a base style because you like it or it comes closest to what you expect and you want to display series+number regardless of what the APA says. In that case I should mention that I generally recommend using biblatex-apa only if you want to follow APA guidelines, if you are just looking for a nice author-year citation/bibliography style that can be customised to your needs, you are usually better off with one of the standard styles. biblatex-apa needs to do some heavy lifting to implement the APA guidelines as closely as possible and can not always – an is not intended to – be as easily customised as the standard styles.
You can find an attempt at hacking biblatex-apa to display series+number at Change 'Series' + 'Number' entries in bibliography with biblatex, but as I said before and also said over there, I don't recommend changing biblatex-apa that drastically. It is a better idea to go with a standard style instead.
biblatex-apaexhibits does not conform to APA style as outlined in the APA manual, please report this at https://github.com/plk/biblatex-apa/issues (ideally with a reference to the relevant APA rules). If this is just an extension of APA that might come in handy for your non-APA purposes, I recommend not usingbiblatex-apa, but rather building a style upon one of the standard styles (style=authoryearfor example) instead. ... – moewe Nov 04 '19 at 21:05biblatex-apahas to jump through a lot of hoops and has to do quite some tricks to implement APA style and that means that it can be quite a bit less customisable in some areas than the standard styles. In any casebiblatex-apawasn't written specifically with the intention of being easily customisable, whereas the standard styles can be seen as a basis to start from if you need a different style. – moewe Nov 04 '19 at 21:06biblatex-apa's only aim is to provide a style that implements APA guidelines by the book. If APA guidelines usually drop the series info, then this is the expected outcome. – moewe Nov 05 '19 at 05:27biblatex-apabugtracker that is an input problem.series+volumedon't go together: Either useseries+numberormaintitle+volume. The combinationseries+volumemay give weird results. (Note that this is one of the things where classical BibTeX andbiblatexdiffer.) – moewe Nov 05 '19 at 16:50biblatex-apawhen I use series+number, then neither of them appears, and when I use maintitle+volume I get first the Series, then the Book title and then the number, which is absurd: Springer Lecture Notes in Computer Science. CICLing 2013: 14th International Conference on Intelligent Text Processing and Computational Linguistics, Samos (Vol. 7816, pp. 201-271). The volume number should be close to the series name, since it is a volume of that series. I would expect: CICLing 2013…Linguistics. Springer Lecture Notes in Computer Science, vol. 7816, pp. 201-271. Am I wrong? – yannis Nov 06 '19 at 18:16