Talvez deva tentar algumas variações de ortografia:
effectiveness decrease » effective decrease (Expandir a busca), effectiveness breast (Expandir a busca), effectiveness access (Expandir a busca)
machine effectiveness » machinery effectiveness (Expandir a busca), vaccine effectiveness (Expandir a busca), teaching effectiveness (Expandir a busca)
decrease using » decrease during (Expandir a busca), decrease owing (Expandir a busca), decreased during (Expandir a busca)
using program » housing program (Expandir a busca), nursing program (Expandir a busca), aging program (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
python code » python coding (Expandir a busca), python redes (Expandir a busca)
code python » codigo python (Expandir a busca), pacote python (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( machine effectiveness decrease using program ) OR ( python code python python programming ))~.