Talvez deva tentar algumas variações de ortografia:
optimization algorithm » optimization algorithms (Expandir a busca)
spectrum optimization » selection optimization (Expandir a busca), swarm optimization (Expandir a busca), vector optimization (Expandir a busca)
soil elasticity » of elasticity (Expandir a busca), price elasticity (Expandir a busca), soil resistivity (Expandir a busca)
algorithm soil » algorithm social (Expandir a busca), algorithm sebal (Expandir a busca), algorithm to (Expandir a busca)
elasticity and » plasticity and (Expandir a busca), electricity and (Expandir a busca), elasticity of (Expandir a busca)
routine and » routines and (Expandir a busca), routing and (Expandir a busca), routine care (Expandir a busca)
and network » area network (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Fazer uma busca fuzzy pode resultar em termos de grafias semelhantes: routine and spectrum optimization algorithm soil elasticity and network optimization~.
• Caso esteja tentando utilizar os operadores booleanos, deve escrevê-los em Letras MAIÚSCULAS: routine AND spectrum optimization algorithm soil elasticity AND network optimization*.