Talvez deva tentar algumas variações de ortografia:
"an introduction _ computer programmers" » "an introduction _ computer programs" (Expandir a busca), "an introduction _ computers programming" (Expandir a busca), "an introduction _ computer program" (Expandir a busca)
"advanced python python computer programming" » "advanced python python computer program" (Expandir a busca), "advanced python python computer programs" (Expandir a busca), "advanced method python computer programming" (Expandir a busca), "advanced path python computer programming" (Expandir a busca), "advanced symphony python computer programming" (Expandir a busca), "advanced pythons python computer programming" (Expandir a busca), "advanced piton python computer programming" (Expandir a busca), "advanced pitons python computer programming" (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Fazer uma busca fuzzy pode resultar em termos de grafias semelhantes: (("an introduction _ computer programmers") OR ("advanced python python computer programming"))~.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "((\"an introduction _ computer programmers\") OR (\"advanced python python computer programming\"))*".
• Remover as aspas pode possibilitar buscas mais amplas: (( an introduction _ computer programmers ) OR ( advanced python python computer programming ))*.