Perhaps you should try some spelling variations:
wsn programming » in programming (Expand search), on programming (Expand search), cone programming (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), ratio decrease (Expand search), rate increase (Expand search)
python usando » python and (Expand search), python estudo (Expand search), python django (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
decrease wsn » decrease when (Expand search), decrease in (Expand search), decrease on (Expand search)

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

• Removing quotes may allow a broader search: (( decrease rate decrease wsn programming ) OR ( python usando python python programming ))~.