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)
increase its » increase in (Expand search), increase and (Expand search)
its decrease » with decrease (Expand search), nts decreases (Expand search), to decrease (Expand search)
decrease on » decrease of (Expand search), decrease or (Expand search), decrease and (Expand search)
on decrease » on decreased (Expand search), of decrease (Expand search), or decrease (Expand search)
in increase » in increased (Expand search), an increase (Expand search), and increase (Expand search)

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

• Removing quotes may allow a broader search: (( decrease on decrease their problems ) OR ( decrease in increase its decrease ))~.