Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
data communication » data communications
site development » sme development, mine development, estate development
technology la » technology law, technology lag, technology land
relation 5.3 » relation 4.3, relations 5.1, relations 5.2
la relation » la revolution, a relational
route data » rate data
5.3 route » 5.3 robuste, 13 route, 5.3 role
cost site » cost side, cost some, cost city

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology la relation 5.3 route data communication cost site development china case.*.