Perhaps you should try some spelling variations:
their projects » the projects (Expand search), their products (Expand search), thematic projects (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decrease treg » decrease the (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
decrease flow » decreases flow (Expand search), decrease low (Expand search), decrease food (Expand search)
flow decrease » flow increase (Expand search), to decrease (Expand search), not decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain 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 treg decrease flow decrease ) OR ( decrease in decrease their projects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease treg decrease flow decrease ) OR ( decrease in decrease their projects ))*.