Perhaps you should try some spelling variations:
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
their decrease » the decrease (Expand search), their disease (Expand search), the decreased (Expand search)
python based » action based (Expand search)
piton python » pitons python (Expand search), in python (Expand search), with python (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease and (Expand search)
based piton » based proton (Expand search), based photon (Expand search), based pilot (Expand search)

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

• Removing quotes may allow a broader search: (( decrease their decrease on program ) OR ( python based piton python programming ))~.