Potser podríeu intentar variants ortogràfiques:
communication estimation » communication motivation, communication mitigation, communication optimization
estimation methods » optimization methods, examination methods, evaluation methods
methods session » methods section
du line » d line, dual line, du livre
2d line » 3d line
du lei » fu lei, mu lei
d ling » de ling, dr ling, _ ling

Pot obtenir més resultats si ajusta la seva cerca.

• Si vols fer servir operadors booleans, han d'estar en majúscules: communication estimation methods session ((((du line) OR (du lei))) OR (((2d line) OR (d ling))))~.
• Afegint truncament pot recuperar més registres: communication estimation methods session ((((du line) or (du lei))) or (((2d line) or (d ling))))*.