Talvez deva tentar algumas variações de ortografia:
observation processing » orientation processing (Expandir a busca), information processing (Expandir a busca), conservation processes (Expandir a busca)
class observation » classroom observation (Expandir a busca), and observation (Expandir a busca), first observation (Expandir a busca)
decrease taping » decrease walking (Expandir a busca), decrease during (Expandir a busca), decrease owing (Expandir a busca)
taping class » typing class (Expandir a busca), mapping class (Expandir a busca), making class (Expandir a busca)
decrease the » decreases the (Expandir a busca), decrease in (Expandir a busca), decrease of (Expandir a busca)
the decrease » and decrease (Expandir a busca)
decrease to » decreased to (Expandir a busca), decrease toc (Expandir a busca), decrease pro (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease taping class observation processing ) OR ( decrease to decrease the decrease ))~.