Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
model development » local development, social development, global development
de communication » mobile communication, online communication
technology cost » technology case, technology can, technology choice
cost relations » east relations, post regulations, cost reductions
china earth » china early, china north, china part
prices de » prices does, prices _, prices a

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

• Adding a wildcard symbol may retrieve word variants: technology cost relations _ prices de communication cost model development china earth.*.