Perhaps you should try some spelling variations:
field progression » and progression (Expand search), cycle progression (Expand search), rapid progression (Expand search)
decrease litter » increased litter (Expand search), decrease after (Expand search), decreases liver (Expand search)
litter increase » litter decrease (Expand search), butter increased (Expand search), matter increases (Expand search)
decrease field » decreases yield (Expand search), increase field (Expand search), decrease lipid (Expand search)
increase with » increases with (Expand search)
with decrease » with decreased (Expand search), with deceased (Expand search), with increase (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease in (Expand search)
at decrease » rate decrease (Expand search), that decrease (Expand search), and 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 at decrease field progression ) OR ( decrease litter increase with decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease at decrease field progression ) OR ( decrease litter increase with decrease ))*.