Perhaps you should try some spelling variations:
methodology proposal » methodological proposal (Expand search)
cotton surface » bottom surface (Expand search), carbon surface (Expand search), kapton surface (Expand search)
using rotating » in rotating (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
under cotton » under common (Expand search), under control (Expand search), ginner cotton (Expand search)

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

• Removing quotes may allow a broader search: (( under cotton surface methodology proposal ) OR ( using rotating python python programming ))~.