Two examples for reproducing:
Open Qt Creator as project. Open advanced find (Ctrl + Shift + F).
Search for "FakeVimSettings::FakeVimSettings()", scope all projects, no options checked, file pattern "*": It is found in src/plugins/fakevim/fakevimactions.cpp
Try the same with file pattern "fakevim*": Nothing is found.
Try file pattern "fakevim*.cpp": Occurrence is found.

Search for "RegistryAccess", with file pattern "fakevim*.cpp": It is found in many files but none of these matches the pattern.