Perhaps you should try some spelling variations:
work effectively » more effectively (Expand search), to effectively (Expand search), are effectively (Expand search)
decrease work » decrease or (Expand search), increase work (Expand search), decrease of (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » and decrease (Expand search), can increase (Expand search), to decrease (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)
on decrease » on decreased (Expand search), or decrease (Expand search), of decrease (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 on decrease can decrease ) OR ( decrease toc decrease work effectively ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease on decrease can decrease ) OR ( decrease toc decrease work effectively ))*.