Perhaps you should try some spelling variations:
decrease decrease » decrease release (Expand search), disease decreases (Expand search), decreases disease (Expand search)
within progenies » sibling progenies (Expand search), in progenies (Expand search), their progenies (Expand search)
decrease within » decrease with (Expand search), decreases with (Expand search), disease within (Expand search)
decrease after » increase after (Expand search), disease after (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease AND decrease within progenies ) OR ( decrease risk decrease decrease after ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decrease within progenies ) OR ( decrease risk decrease decrease after ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decrease within progenies ) OR ( decrease risk decrease decrease after ))*.