Perhaps you should try some spelling variations:
function function » function functional, functions functional, function dysfunction
parallel problem » parallel program, parallel programs, parallel robots
function https » functions https, fiction https
rab function » rb function, creb function, kb function
problem rab » problem rat, problem real, problem ralf

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

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