Perhaps you should try some spelling variations:
dense retrieval » phase retrieval (Expand search), dna retrieval (Expand search), depth retrieval (Expand search)
decrease the » decreases the (Expand search), decrease of (Expand search)
decrease not » decrease of (Expand search), decrease akt (Expand search), decrease at (Expand search)
not decrease » to decrease (Expand search), not increase (Expand search), and decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
the dense » the sense (Expand search), the tense (Expand search), the defense (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease the dense retrieval models ) OR ( decrease in decrease NOT decrease ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the dense retrieval models ) OR ( decrease in decrease not decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the dense retrieval models ) OR ( decrease in decrease not decrease ))*.