Perhaps you should try some spelling variations:
decreases yield » increases yield (Expand search), decreases cell (Expand search), decreases il (Expand search)
yield objects » field objects (Expand search), fields objects (Expand search), field object (Expand search)
decrease may » decrease at (Expand search), decrease by (Expand search), decrease human (Expand search)
may decrease » may increase (Expand search), can decrease (Expand search), to decrease (Expand search)
decrease l » decrease il (Expand search), decrease β (Expand search), decrease low (Expand search)
l decrease » _ decrease (Expand search), α 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 l decrease may decrease ) OR ( decrease _ decreases yield objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease l decrease may decrease ) OR ( decrease _ decreases yield objects ))*.