Perhaps you should try some spelling variations:
decrease swallowing » disease swallowing (Expand search), decrease following (Expand search), decrease walking (Expand search)
swallowing patterns » swallowing pattern (Expand search), swallowing after (Expand search), calling patterns (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)
decrease need » decreased need (Expand search), decreased feed (Expand search), decrease the (Expand search)
need decrease » speed decrease (Expand search), speed decreases (Expand search), the decrease (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (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 rate decrease need decrease ) OR ( decrease AND decrease swallowing patterns ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease rate decrease need decrease ) OR ( decrease and decrease swallowing patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rate decrease need decrease ) OR ( decrease and decrease swallowing patterns ))*.