You could try using "locate" if it says command not recognised you can install it with
sudo apt-get install mlocate when it is installed you must run
sudo updatedb then type
locate <text> and it will list files with the text string either in the name or the path, I usually find it gives more results than you would want but it can always be refined further with a grep like this
locate quicktest | grep doc and it will only show files with doc in the name/path. I find it very useful, but remember to "updatedb" before you search to include / exclude files that have been added / removed recently.