Perhaps you should try some spelling variations:
methodology approach » methodological approach (Expand search), methodological approaches (Expand search), methodology applied (Expand search)
cotton surface » bottom surface (Expand search), carbon surface (Expand search), kapton surface (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder cotton » over cotton (Expand search), under cotton (Expand search), model cotton (Expand search)
in rotating » _ rotating (Expand search), of rotating (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 approach ) OR ( in rotating python python programming ))~.