Perhaps you should try some spelling variations:
waste processing » image processing (Expand search), the processing (Expand search), pre processing (Expand search)
decrease ratio » decreased ratio (Expand search), decrease at (Expand search), decreased rate (Expand search)
ratio decrease » to decrease (Expand search), rats decreases (Expand search)
decrease waste » decreases water (Expand search), increase wastes (Expand search), decrease after (Expand search)
python codigos » python codigo (Expand search), python coding (Expand search), vpython colisoes (Expand search)
codigos python » codigo python (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)

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

• Removing quotes may allow a broader search: (( decrease ratio decrease waste processing ) OR ( python codigos python python programming ))~.