Perhaps you should try some spelling variations:
decreases these » decreases the (Expand search), decreases th2 (Expand search), decreases pest (Expand search)
these processes » the processes (Expand search), thermal processes (Expand search), change processes (Expand search)
mapping methods » mapping method (Expand search), making methods (Expand search), matching methods (Expand search)
python mapping » photon mapping (Expand search), position mapping (Expand search)
methods python » methods action (Expand search), pythons python (Expand search), methods method (Expand search)
std decreases » and decreases (Expand search), d decreases (Expand search), nts decreases (Expand search)
decrease std » decrease sod (Expand search), decrease and (Expand search), decrease at (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 std decreases these processes ) OR ( python mapping methods python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease std decreases these processes ) OR ( python mapping methods python programming ))*.