Talvez deva tentar algumas variações de ortografia:
decrease sparking » decrease walking (Expandir a busca), decrease during (Expandir a busca)
sparking pattern » stacking pattern (Expandir a busca), stacking patterns (Expandir a busca), spawning patterns (Expandir a busca)
decrease their » decrease the (Expandir a busca), increase their (Expandir a busca), decreases the (Expandir a busca)
their decrease » the decrease (Expandir a busca), their disease (Expandir a busca), the decreased (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)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease _ decrease their decrease ) OR ( decrease rate decrease sparking pattern ))~.