Is it possible to search for strings containing spaces and special characters?

In our RoboHelp project, there are figures with text labels such as Figure 1, Figure 3-2, etc.

When I search for "Figure 3" I get all pages containing "Figure" and "3", even if I surround it in quotes.  Similarly, searching for "3-2" treats the '-' character as a space and searches for all pages containing '3' or '2'.

Is there a way to search for strings containing spaces and special characters?