Talvez deva tentar algumas variações de ortografia:
decrease flying » decrease flooding (Expandir a busca), decrease walking (Expandir a busca), decrease during (Expandir a busca)
decreased sperm » decreased sleep (Expandir a busca)
sperm decrease » term decrease (Expandir a busca), speed decrease (Expandir a busca), speed decreases (Expandir a busca)
flying objects » moving objects (Expandir a busca), flying insects (Expandir a busca)
decrease the » decreases the (Expandir a busca), decrease in (Expandir a busca)
the decrease » to decrease (Expandir a busca), and decrease (Expandir a busca)
decrease of » decrease in (Expandir a busca)
of decrease » or decrease (Expandir a busca), not decrease (Expandir a busca), to decrease (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decreased sperm decrease of decrease ) OR ( decrease the decrease flying objects ))~.