Talvez deva tentar algumas variações de ortografia:
opinion extraction » solution extraction (Expandir a busca), lignin extraction (Expandir a busca), non extraction (Expandir a busca)
vba programming » goal programming (Expandir a busca), java programming (Expandir a busca), _ programming (Expandir a busca)
extraction vba » extraction via (Expandir a busca), extraction by (Expandir a busca), extraction boa (Expandir a busca)
coder opinion » voter opinion (Expandir a busca), model opinion (Expandir a busca), concern opinion (Expandir a busca)
coping python » using python (Expandir a busca), codigo python (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
using coping » using coding (Expandir a busca), using coupling (Expandir a busca), nursing coping (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: "(( coder opinion extraction vba programming ) OR ( using coping python python programming ))~".
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: (( coder opinion extraction vba programming ) OR ( using coping python python programming ))*.