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 in (Expand search), decrease of (Expand search)
decrease toc » decrease of (Expand search), decreased to (Expand search), decrease on (Expand search)
toc decrease » the decrease (Expand search), not decrease (Expand search), of decrease (Expand search)
decrease to » decreased to (Expand search), decrease pro (Expand search), decrease its (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease the dense retrieval models ) OR ( decrease toc decrease to decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the dense retrieval models ) OR ( decrease toc decrease to decrease ))*.