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
rb function » rab function, kb function, b function
problem rb » problem 3b, problem re, problem r

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 rb function function https~.
• Adding a wildcard symbol may retrieve word variants: parallel problem rb function function https*.