Talvez deva tentar algumas variações de ortografia:
noise preprocessing » image preprocessing (Expandir a busca), the preprocessing (Expandir a busca), based preprocessing (Expandir a busca)
decrease noise » decrease risk (Expandir a busca)
decrease toc » decrease of (Expandir a busca), decrease the (Expandir a busca), decreased to (Expandir a busca)
toc decrease » the decrease (Expandir a busca), not decrease (Expandir a busca), of decrease (Expandir a busca)
decrease to » decreased to (Expandir a busca), decrease the (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 OR decrease noise preprocessing ) OR ( decrease toc decrease to decrease ))~.