Not just you. It can give no results and partial results, which is sometimes fixed on a re-query.
But it also is just poor for code. I think it wants to find full words, so searching for substrings generally results in too few matches. That's made worse by its special character handling in word splitting and query parsing which makes some text impossible to find.
But it also is just poor for code. I think it wants to find full words, so searching for substrings generally results in too few matches. That's made worse by its special character handling in word splitting and query parsing which makes some text impossible to find.