Perhaps you should try some spelling variations:
decrease pulmonary » decreases pulmonary (Expand search), increased pulmonary (Expand search), increases pulmonary (Expand search)
pulmonary abscess » pulmonary abscesses (Expand search), pulmonary agenesis (Expand search), pulmonary vessels (Expand search)
decrease food » decreases food (Expand search), increase food (Expand search), decreases blood (Expand search)
food decrease » food decreases (Expand search), foods decreases (Expand search), flow decrease (Expand search)
decrease or » decrease on (Expand search), decrease pro (Expand search), decrease toc (Expand search)
or decrease » not decrease (Expand search), to decrease (Expand search), _ decrease (Expand search)
decrease of » decrease in (Expand search)
of decrease » not decrease (Expand search), to decrease (Expand search), _ decrease (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 OR decrease pulmonary abscess ) OR ( decrease of decrease food decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease or decrease pulmonary abscess ) OR ( decrease of decrease food decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease or decrease pulmonary abscess ) OR ( decrease of decrease food decrease ))*.