Talvez deva tentar algumas variações de ortografia:
"coder retention on coding program" » "copper retention on coding program" (Expandir a busca), "color retention on coding program" (Expandir a busca), "water retention on coding program" (Expandir a busca), "coder retention on cloning program" (Expandir a busca), "coder retention on loading program" (Expandir a busca), "coder retention on cooling programs" (Expandir a busca), "coder retention of coding program" (Expandir a busca), "coder retention in coding program" (Expandir a busca), "coder retention and coding program" (Expandir a busca), "coder retention non coding program" (Expandir a busca)
"_ python python python programming" » "_ pythons python python programming" (Expandir a busca), "_ piton python python programming" (Expandir a busca), "_ pitons python python 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: (("coder retention on coding program") OR ("_ python python python programming"))~.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "((\"coder retention on coding program\") OR (\"_ python python python programming\"))*".
• Remover as aspas pode possibilitar buscas mais amplas: (( coder retention on coding program ) OR ( _ python python python programming ))*.