Perhaps you should try some spelling variations:
decrease tumoral » decreased humoral (Expand search), necrose tumoral (Expand search), decreased tumor (Expand search)
tumoral progress » temporal progress (Expand search), moral progress (Expand search), tumoral progression (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), and decrease (Expand search)
decrease akt » decrease at (Expand search), decrease and (Expand search), decrease after (Expand search)
akt decrease » and decrease (Expand search), not decrease (Expand search), any decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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 rate decrease tumoral progress ) OR ( decrease to decrease akt decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease rate decrease tumoral progress ) OR ( decrease to decrease akt decrease ))*.