Perhaps you should try some spelling variations:
dense methods » dense method (Expand search), defense methods (Expand search), dance methods (Expand search)
decrease urea » decrease treg (Expand search), decrease burden (Expand search), decreases areas (Expand search)
decrease may » decrease at (Expand search), decrease by (Expand search), decrease human (Expand search)
may decrease » may increase (Expand search), can decrease (Expand search), to decrease (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
urea dense » urea fence (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 may decrease of decrease ) OR ( decrease urea dense methods AND ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease may decrease of decrease ) OR ( decrease urea dense methods and ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease may decrease of decrease ) OR ( decrease urea dense methods and ))*.