Perhaps you should try some spelling variations:
reference python » reference method, reference author, reference edition
based microscope » based microscopy, based microscopic, phase microscope
microscope https » microscopy https, microscope hans, microscope its
python progress » python programs, method progress, python program
progress based » process based, programs based, progress case

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

• Performing a fuzzy search may retrieve terms with similar spellings: reference python progress based microscope https~.
• Adding a wildcard symbol may retrieve word variants: reference python progress based microscope https*.