Perhaps you should try some spelling variations:
decrease frontier » decrease further (Expand search)
their decreases » heme decreases (Expand search), merr decreases (Expand search), therapy decreases (Expand search)
frontier object » frontier objects (Expand search), frontier context (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
cell decrease » cells decrease (Expand search), cells decreases (Expand search), will decrease (Expand search)
decrease any » decrease and (Expand search), decreases and (Expand search), decreased and (Expand search)
any decrease » and decrease (Expand search), can decrease (Expand search), may 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: "(( decrease their decreases cell decrease ) OR ( decrease any decrease frontier object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease their decreases cell decrease ) OR ( decrease any decrease frontier object ))*.