Perhaps you should try some spelling variations:
mechanical harvesting » mechanized harvesting (Expand search), mechanical testing (Expand search)
decrease mechanical » disease mechanical (Expand search), database mechanical (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease lesions decrease mechanical harvesting ) OR ( decrease NOT decrease of decrease ))*.