Perhaps you should try some spelling variations:
postgresql function » postgresql functions, postgresql functionality
function functional » functions functional, fractional functional, nutrition functional
string postgresql » securing postgresql, installing postgresql
functional https » functions https, function https, functional hop
parallel string » parallel parking, parallel stream, parallel using

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: parallel string postgresql function functional https~.
• Adding a wildcard symbol may retrieve word variants: parallel string postgresql function functional https*.