Talvez deva tentar algumas variações de ortografia:
"and implementation in loading problem" » "and implementation and loading problem" (Expandir a busca), "and implementation of loading problem" (Expandir a busca), "and implementation in routing problem" (Expandir a busca), "and implementation in planning problem" (Expandir a busca), "and implementation in leading problem" (Expandir a busca), "and implementation ii loading problem" (Expandir a busca), "and implementation i loading problem" (Expandir a busca)
"using python python python programming" » "using pythons python python programming" (Expandir a busca), "using piton python python programming" (Expandir a busca), "using pitons python python programming" (Expandir a busca), "usando python python python programming" (Expandir a busca), "in python python python programming" (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "((\"and implementation in loading problem\") OR (\"using python python python programming\"))~".
• Remover as aspas pode possibilitar buscas mais amplas: (( and implementation in loading problem ) OR ( using python python python programming ))~.
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: (("and implementation in loading problem") OR ("using python python python programming"))*.