Perhaps you should try some spelling variations:
decrease variant » decreases ovarian (Expand search), decreased ovarian (Expand search), decrease asian (Expand search)
decreasing costs » decreasing cost (Expand search), decreasing rest (Expand search), decrease costs (Expand search)
variant pattern » invariant pattern (Expand search), variate pattern (Expand search), ovarian patterns (Expand search)
and decreasing » and increasing (Expand search), and decreases (Expand search), and decreased (Expand search)
costs decrease » loss decrease (Expand search), cells decrease (Expand search), cost increase (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (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 decreasing costs decrease ) OR ( decrease NOT decrease variant pattern ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decreasing costs decrease ) OR ( decrease not decrease variant pattern ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decreasing costs decrease ) OR ( decrease not decrease variant pattern ))*.