Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information case » information based, information can, information costs
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
case des » cases des, case das, phase des
cost 2.3 » costs 2.3, cost 2.4, cost 2.2
des de » des dem, des der, des des

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information case des de communication cost 2.3 developing _ areas.*.