Talvez deva tentar algumas variações de ortografia:
defense tutorial » defense material (Expandir a busca), defense materials (Expandir a busca)
tutorial program » tutoring program (Expandir a busca), material program (Expandir a busca), social program (Expandir a busca)
ordered models » ordered model (Expandir a busca), order models (Expandir a busca), order model (Expandir a busca)
models defense » models disease (Expandir a busca), models depends (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
python code » python coding (Expandir a busca), python redes (Expandir a busca)
code python » codigo python (Expandir a busca), pacote python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( ordered models defense tutorial program ) OR ( python code python python programming ))~.