If you are free to use LuaLaTeX or XeLaTeX, and if fonts named Verdana and Cambria are installed on your computer system, all you need to do is load the fontspec package, issue a suitable \setmainfont directive, and issue two \newfontfamily directives to specify how to make the text font switch over to Cambria and Verdana, respectively. Use grouping to delimit the scope of the \Cambria and \Verdana directives.
Aside: In both \newfontfamily directives, I'd use the option Scale=MatchLowercase to ensure that the fonts mesh reasonably well (at least size-wise) with the main text font. And, if you need the basic "TeX ligatures" such as en- and em-dashes, be sure to specify the option Ligatures=TeX.

\documentclass{article}
\usepackage{fontspec}
\setmainfont{Times New Roman} % or some other suitable font
\newfontfamily\Cambria{Cambria}[Scale=MatchLowercase,
Ligatures=TeX]
\newfontfamily\Verdana{Verdana}[Scale=MatchLowercase,
Ligatures=TeX]
\newcommand\qbf{The quick brown fox jumps over the lazy dog}
\begin{document}
\qbf. --- Times New Roman
{\Cambria \qbf. --- Cambria}
{\Verdana \qbf. --- Verdana}
\end{document}
\fontsizedirective. E.g.,\fontsize{11}{13}\selectfont. (Here, 11pt is the main font size and 13pt is the so-called baselineskip.) – Mico Sep 28 '18 at 14:49fontspecpackage) does let you use system fonts. – Mico Sep 28 '18 at 14:50