Perhaps you should try some spelling variations:
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
during decrease » during increased (Expand search), during depressed (Expand search), during disease (Expand search)
at professor » pt professor (Expand search), ai professor (Expand search), ator professor (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease on (Expand search)
can increase » an increase (Expand search), and increase (Expand search), an increased (Expand search)
increase toc » increase to (Expand search), increase the (Expand search), increase tax (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease in (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 during decrease at professor ) OR ( decrease can increase toc decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during decrease at professor ) OR ( decrease can increase toc decrease ))*.