Perhaps you should try some spelling variations:
decreased desertification » increased diversification (Expand search), areas desertification (Expand search), semiarid desertification (Expand search)
desertification process » identification process (Expand search), identification processes (Expand search)
in decreased » is decreased (Expand search), in deceased (Expand search), and decreased (Expand search)
decrease pro » decrease food (Expand search), decrease treg (Expand search), decrease of (Expand search)
pro decrease » to decrease (Expand search), price decrease (Expand search), term decrease (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), to decrease (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease toc (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 in decreased desertification process ) OR ( decrease OR decrease pro decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease in decreased desertification process ) OR ( decrease or decrease pro decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease in decreased desertification process ) OR ( decrease or decrease pro decrease ))*.