Right now the search seems to only look for the filename itself. It would be cool if you could include the path as well so that I could type something like "gui object" and it would display "\\gui\\objects\\Object.cpp" even though there's also a "\\game\\objects\\Object.cpp"
You can already search with the path as well as the file name. Here, use the search "\\gui object" which searches for all files containing the word "object" with a path containing the directory name "gui". More examples are given here:
If you want to get a bit more clever with your searching, use minus to filter out items you don't want, so for example you can use the filter "\\gui object -.h" to filter out all .h files from the result list.