Talvez deva tentar algumas variações de ortografia:
global perfusion » regional perfusion (Expandir a busca), global perception (Expandir a busca), blood perfusion (Expandir a busca)
perfusion python » perfusion method (Expandir a busca), perfusion methods (Expandir a busca), perfusion with (Expandir a busca)
python codigos » python codigo (Expandir a busca), python coding (Expandir a busca), vpython colisoes (Expandir a busca)
codigos python » codigo python (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder python » codigo python (Expandir a busca), compra python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder python codigos python ) OR ( global perfusion python python programming ))~.