Talvez deva tentar algumas variações de ortografia:
teaching object » teaching subject (Expandir a busca), teaching project (Expandir a busca), learning object (Expandir a busca)
decrease rate » decreased rate (Expandir a busca), decreases rate (Expandir a busca), decrease at (Expandir a busca)
rate decrease » rats decreases (Expandir a busca), rate increase (Expandir a busca), to decrease (Expandir a busca)
decrease fear » decreased fear (Expandir a busca), decrease fetal (Expandir a busca), decreased heart (Expandir a busca)
case teaching » care teaching (Expandir a busca), face teaching (Expandir a busca), game teaching (Expandir a busca)
in decrease » in decreased (Expandir a busca), on decrease (Expandir a busca), pain decrease (Expandir a busca)
fear case » year case (Expandir a busca), ear case (Expandir a busca), fear scale (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease rate decrease in decrease ) OR ( decrease fear case teaching object ))~.