Perhaps you should try some spelling variations:
explaining microscopy » staining microscopy, planning microscope, scanning microscopy
programs explaining » programs exploiting, programs planning, programs exploring
introducing python » introducing action, introducing mythtv, introducing person
python programs » python program, action programs, method programs
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: introducing python programs explaining microscopy https~.
• Adding a wildcard symbol may retrieve word variants: introducing python programs explaining microscopy https*.