Perhaps you should try some spelling variations:
sampling python » sampling method (Expand search), sampling position (Expand search), sampling methods (Expand search)
python sampling » method sampling (Expand search), thin sampling (Expand search), methods sampling (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
decrease toc » decrease the (Expand search), decrease on (Expand search), decreased to (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
decrease of » decrease in (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 of programming ) OR ( python sampling python python programming ))~.