Perhaps you should try some spelling variations:
methodology problem » methodology proposed (Expand search), methodology project (Expand search), methodology public (Expand search)
sampling method » sampling methods (Expand search)
cotton surface » bottom surface (Expand search), carbon surface (Expand search), kapton surface (Expand search)
using sampling » using subsampling (Expand search), using saline (Expand search), sinus sampling (Expand search)
method python » method method (Expand search), python python (Expand search)
coder cotton » over cotton (Expand search), under cotton (Expand search), model cotton (Expand search)

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

• Removing quotes may allow a broader search: (( coder cotton surface methodology problem ) OR ( using sampling method python programming ))~.