Perhaps you should try some spelling variations:
waste processing » image processing (Expand search), the processing (Expand search), pre processing (Expand search)
decreased semen » decreased level (Expand search), decreased sleep (Expand search), decreased serum (Expand search)
semen decrease » stent decrease (Expand search), speed decrease (Expand search), times decrease (Expand search)
decrease waste » decreases water (Expand search), increase wastes (Expand search), decrease after (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not 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: "(( decreased semen decrease waste processing ) OR ( decrease toc decrease OR decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreased semen decrease waste processing ) OR ( decrease toc decrease OR decrease ))*.