Perhaps you should try some spelling variations:
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
their problems » the problems (Expand search)
based battery » based pattern (Expand search), based batteries (Expand search), acid battery (Expand search)
python based » action based (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease of decrease their problems ) OR ( python based battery python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease their problems ) OR ( python based battery python programming ))*.