Talvez deva tentar algumas variações de ortografia:
string problem » sizing problem (Expandir a busca), rostering problem (Expandir a busca), sharing problems (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder model » cover model (Expandir a busca), decoder model (Expandir a busca), copper model (Expandir a busca)
open string » ten string (Expandir a busca), on string (Expandir a busca)
model open » model on (Expandir a busca), model over (Expandir a busca)
in python » _ python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder model open string problem ) OR ( in python python python programming ))~.