Perhaps you should try some spelling variations:
its professors » with professors (Expand search), in professors (Expand search), to professors (Expand search)
decrease its » decreases its (Expand search), decrease with (Expand search), decrease in (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search)
the decrease » and decrease (Expand search), _ decrease (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), of decree (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease low (Expand search)

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

• Removing quotes may allow a broader search: (( decrease of decrease its professors ) OR ( decrease to decrease the decrease ))~.