Talvez deva tentar algumas variações de ortografia:
vpython problems » vision problems (Expandir a busca), method problems (Expandir a busca), motion problems (Expandir a busca)
fitting methods » costing methods (Expandir a busca), feeding methods (Expandir a busca)
coding vpython » modeling vpython (Expandir a busca), codigo python (Expandir a busca)
python coding » action coding (Expandir a busca), python code (Expandir a busca)
methods piton » methods action (Expandir a busca), methods newton (Expandir a busca), methods pile (Expandir a busca)
coder python » codigo python (Expandir a busca), compra python (Expandir a busca)
piton python » pitons python (Expandir a busca), in python (Expandir a busca), with python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder python coding vpython problems ) OR ( fitting methods piton python programming ))~.