Perhaps you should try some spelling variations:
decrease purchase » lease purchase (Expand search), declared purchase (Expand search), decrease sucrose (Expand search)
purchase process » purchasing process (Expand search)
method python » method method (Expand search), python python (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
python api » python and (Expand search)
api method » iapi method (Expand search), bpi method (Expand search), epi method (Expand search)

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

• Removing quotes may allow a broader search: (( decrease of decrease purchase process ) OR ( python api method python programming ))~.