Perhaps you should try some spelling variations:
bacterial effector » bacterial vector (Expand search), bacteria effect (Expand search), bacterial infection (Expand search)
decrease bacterial » increase bacterial (Expand search), decrease arterial (Expand search), increased bacterial (Expand search)
decrease owing » decrease lodging (Expand search), decrease during (Expand search), decrease in (Expand search)
owing decrease » taping decrease (Expand search), will decrease (Expand search), skins decrease (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)

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 owing decrease _ decrease ) OR ( decrease can decrease bacterial effector ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease owing decrease _ decrease ) OR ( decrease can decrease bacterial effector ))*.