Perhaps you should try some spelling variations:
retrieval process » retrieval models (Expand search), removal process (Expand search)
decrease rapidly » disease rapidly (Expand search), decrease lipid (Expand search)
rapidly decrease » rapid decrease (Expand search), rapid increase (Expand search), taping decrease (Expand search)
dense retrieval » phase retrieval (Expand search), dna retrieval (Expand search), depth retrieval (Expand search)
decrease can » decrease in (Expand search), decrease and (Expand search), decrease at (Expand search)
can decrease » can increase (Expand search), and decrease (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 OR dense retrieval process ) OR ( decrease can decrease rapidly decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease OR dense retrieval process ) OR ( decrease can decrease rapidly decrease ))*.