Perhaps you should try some spelling variations:
methodological problems » methodological process (Expand search), methodological proposals (Expand search), methodological processes (Expand search)
surface methodological » surface meteorological (Expand search), interface methodological (Expand search), surface methodology (Expand search)
active surface » active surfaces (Expand search), selective surface (Expand search), fracture surface (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
coder active » copper active (Expand search), power active (Expand search), under active (Expand search)
using usando » tuning usando (Expand search), usinagem usando (Expand search), sensing usando (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coder active surface methodological problems ) OR ( using usando python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder active surface methodological problems ) OR ( using usando python python programming ))*.