Perhaps you should try some spelling variations:
decrease fields » decreases yield (Expand search), increase field (Expand search)
decreased human » decrease human (Expand search), decreased hemin (Expand search), decreased humoral (Expand search)
with decreased » with increased (Expand search)
human decrease » human deceased (Expand search), human increase (Expand search), human disease (Expand search)
fields objects » fields effects (Expand search), field subjects (Expand search)
decrease with » decreases with (Expand search), increase with (Expand search), decrease in (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 with decreased human decrease ) OR ( decrease AND decrease fields objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease with decreased human decrease ) OR ( decrease AND decrease fields objects ))*.