Perhaps you should try some spelling variations:
database retrieval » data retrieval (Expand search)
retrieval problems » retrieval process (Expand search), ethical problems (Expand search), extremal problems (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt database » and database (Expand search), est database (Expand search), iot database (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search), _ 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 akt database retrieval problems ) OR ( decrease the decrease AND decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease akt database retrieval problems ) OR ( decrease the decrease AND decrease ))*.