Talvez deva tentar algumas variações de ortografia:
defense learning » defense planning (Expandir a busca), deleuze learning (Expandir a busca), defense training (Expandir a busca)
learning object » learning objects (Expandir a busca)
decrease ratio » decreased ratio (Expandir a busca), decrease at (Expandir a busca), decreased rate (Expandir a busca)
ratio decrease » rate decrease (Expandir a busca), rapid decrease (Expandir a busca), ratio increase (Expandir a busca)
decrease or » decrease of (Expandir a busca), decrease on (Expandir a busca), decrease pro (Expandir a busca)
or decrease » of decrease (Expandir a busca), not decrease (Expandir a busca), to decrease (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Caso esteja tentando utilizar os operadores booleanos, deve escrevê-los em Letras MAIÚSCULAS: (( decrease OR decrease ratio decrease ) OR ( decrease in defense learning object ))~.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "(( decrease or decrease ratio decrease ) OR ( decrease in defense learning object ))~".
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: (( decrease or decrease ratio decrease ) OR ( decrease in defense learning object ))*.