Perhaps you should try some spelling variations:
operation function » operations function, operational functions, operator functions
function programs » functions programs, function program, functional programs
probe microscopy » force microscopy
programs probe » programs problem, programs proved, programs proven
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: operation function programs probe microscopy https~.
• Adding a wildcard symbol may retrieve word variants: operation function programs probe microscopy https*.