Perhaps you should try some spelling variations:
functions programmes » functions programmed, functions programs, functional programs
programmes problems » programs problems, programming problems, programmer's problem
problems microscopy » probe microscopy, probe microscope
operator functions » operational functions, operations function, operator equations
https » http

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

• Performing a fuzzy search may retrieve terms with similar spellings: operator functions programmes problems microscopy https~.
• Adding a wildcard symbol may retrieve word variants: operator functions programmes problems microscopy https*.