Perhaps you should try some spelling variations:
decrease external » decreases maternal (Expand search), decade external (Expand search), decrease arterial (Expand search)
external programs » external problems (Expand search), exterior programas (Expand search), federal programs (Expand search)
pattern decoding » pattern defining (Expand search), patterns according (Expand search), patterns depending (Expand search)
decoding python » decoding method (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
decrease toc » decrease of (Expand search), decrease the (Expand search), decrease on (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease toc decrease external programs ) OR ( pattern decoding python python programming ))~.