Perhaps you should try some spelling variations:
increase field » increase yield (Expand search), increases yield (Expand search), increased yield (Expand search)
field subjects » aged subjects (Expand search), field projects (Expand search)
decrease will » decrease with (Expand search), decrease cell (Expand search), decrease il (Expand search)
will increase » still increase (Expand search), hill increased (Expand search), will decrease (Expand search)
decrease any » decrease and (Expand search), decreases and (Expand search), decreased and (Expand search)
any decrease » and decrease (Expand search), can decrease (Expand search), may decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease AND decrease any decrease ) OR ( decrease will increase field subjects ))~.