Perhaps you should try some spelling variations:
training decreases » training increases (Expand search)
decrease training » increased training (Expand search), disease training (Expand search), release training (Expand search)
decreases flying » decreases lung (Expand search), decreases during (Expand search), decreases along (Expand search)
flying objects » moving objects (Expand search), flying insects (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and 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 AND decrease NOT decrease ) OR ( decrease training decreases flying objects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease AND decrease not decrease ) OR ( decrease training decreases flying objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease not decrease ) OR ( decrease training decreases flying objects ))*.