Perhaps you should try some spelling variations:
semen processadas » serem processadas (Expand search), sementes processadas (Expand search), semen processed (Expand search)
decreased semen » decreased level (Expand search), decreased sleep (Expand search), decreased serum (Expand search)
risk decreased » risk decreases (Expand search), is decreased (Expand search), cross decreased (Expand search)
decrease human » increase human (Expand search), disease human (Expand search), decrease asian (Expand search)
human decrease » human deceased (Expand search), human increase (Expand search), human disease (Expand search)
decrease risk » decreased risk (Expand search), increase risk (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 risk decreased semen processadas ) OR ( decrease human decrease AND decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease risk decreased semen processadas ) OR ( decrease human decrease AND decrease ))*.