Perhaps you should try some spelling variations:
period programming » grid programming (Expand search), method programming (Expand search), end programming (Expand search)
decrease implicit » decade implicit (Expand search), verdade implicit (Expand search)
implicit period » implicit method (Expand search), implicit operation (Expand search), implicit methods (Expand search)
decrease of » decrease in (Expand search)
of diseases » of disease (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 of diseases disease process ) OR ( AND decrease implicit period programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of diseases disease process ) OR ( AND decrease implicit period programming ))*.