Perhaps you should try some spelling variations:
varying coefficient » varying coefficients (Expand search), damping coefficient (Expand search), variation coefficient (Expand search)
coefficient coding » efficient coding (Expand search), coefficient modeling (Expand search), coefficient bending (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
co varying » to varying (Expand search), can varying (Expand search), of varying (Expand search)
in python » _ python (Expand search)
coder co » code co (Expand search), under co (Expand search), order co (Expand search)

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

• Removing quotes may allow a broader search: (( coder co varying coefficient coding ) OR ( in python python python programming ))~.