Talvez deva tentar algumas variações de ortografia:
"coherent precoding based algorithm problem" » "coherent precoding based algorithms problem" (Expandir a busca), "coherent precoding based algoritmo problema" (Expandir a busca), "coherent precoding based logarithm problem" (Expandir a busca), "coherent reading based algorithm problem" (Expandir a busca), "coherent precoding and algorithm problem" (Expandir a busca), "coherent coding based algorithm problem" (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: (("coherent precoding based algorithm problem") OR ("_ python python python programming"))~.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "((\"coherent precoding based algorithm problem\") OR (\"_ python python python programming\"))".
• Remover as aspas pode possibilitar buscas mais amplas: (( coherent precoding based algorithm problem ) OR ( _ python python python programming )).
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: (("coherent precoding based algorithm problem") OR ("_ python python python programming"))*.