Perhaps you should try some spelling variations:
methodology problems » methodology problem (Expand search), methodology process (Expand search), methodological problems (Expand search)
function surface » functional surface (Expand search), functional surfaces (Expand search), function space (Expand search)
coder function » modern function (Expand search), power function (Expand search), over function (Expand search)
ranking python » ranking method (Expand search), ranking position (Expand search)
using ranking » using stacking (Expand search), using resting (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: (( coder function surface methodology problems ) OR ( using ranking python python programming ))~.