Perhaps you should try some spelling variations:
comprehension process » comprehension test (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc sentence » to sentence (Expand search), the sentence (Expand search), of sentence (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 AND decrease that decrease ) OR ( decrease toc sentence comprehension process ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease that decrease ) OR ( decrease toc sentence comprehension process ))*.