Perhaps you should try some spelling variations:
decreases sperm » decreased sperm (Expand search), decreases serum (Expand search), decreasing sperm (Expand search)
coal processing » local processing (Expand search), oil processing (Expand search), dual processing (Expand search)
sperm decrease » term decrease (Expand search), speed decrease (Expand search), speed decreases (Expand search)
decrease coal » decrease total (Expand search), decrease cell (Expand search), decrease costs (Expand search)
decrease life » decrease liver (Expand search), increase life (Expand search), decreases liver (Expand search)
life decrease » life decreases (Expand search), life decreased (Expand search), life increase (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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: "(( decreases sperm decrease coal processing ) OR ( decrease to decrease life decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decreases sperm decrease coal processing ) OR ( decrease to decrease life decrease ))*.