Perhaps you should try some spelling variations:
river processes » drivers processes (Expand search), driven processes (Expand search), linear processes (Expand search)
decrease river » decrease liver (Expand search), decreases liver (Expand search), decrease litter (Expand search)
pythons python » python python (Expand search), pitons python (Expand search), piton 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)
api pythons » api python (Expand search)
python api » python and (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 toc decrease river processes ) OR ( python api pythons python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease toc decrease river processes ) OR ( python api pythons python programming ))*.