Perhaps you should try some spelling variations:
operation function » operations function, operational functions, operator functions
function programs » functions programs, function program, functional programs
probe microscopes » probe microscopy
microscopes https » microscopy https, microscope hans, microscope its
programs probe » programs problem, programs proved, programs proven

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 microscopes https~.
• Adding a wildcard symbol may retrieve word variants: operation function programs probe microscopes https*.