Talvez deva tentar algumas variações de ortografia:
irrigation channels » irrigation canals (Expandir a busca), irrigation canal (Expandir a busca), distribution channels (Expandir a busca)
disease processes » disease process (Expandir a busca), disease progress (Expandir a busca), these processes (Expandir a busca)
channels decrease » changes decrease (Expandir a busca)
decrease decrease » decrease release (Expandir a busca), decreases disease (Expandir a busca), disease decreases (Expandir a busca)
decrease disease » decreases disease (Expandir a busca), increase disease (Expandir a busca), increased disease (Expandir a busca)
decrease after » disease after (Expandir a busca)
decrease or » decrease of (Expandir a busca), decrease pro (Expandir a busca), decrease toc (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 disease processes ) OR ( irrigation channels decrease decrease after ))~.
• As palavras AND, OR e NOT pode ocasionar problemas na busca; tente utilizar as aspas: "(( decrease or decrease disease processes ) OR ( irrigation channels decrease decrease after ))~".
• Adicionar um caractere curinga pode recuperar variações da palavra buscada: (( decrease or decrease disease processes ) OR ( irrigation channels decrease decrease after ))*.