How does the CTRL F command work on gdevleop

How does the CTRL F command work when finding specific code. I am trying to use it to find what’s wrong with my code and it seems to be very inconsistent in what its highlighting.
for example


i tried to find all of the code with a timer in it and it highlighted code that was loosely related to the timer while not highlighting other code with similar formats.

If any clarification is needed please just ask