Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information costs » information contents, information centers, information content
used information » user information, use information, based information
technology used » technology use, technology based, technology users
y communication » 3 communication, 4 communication, 1 communication
2.4 developing » 12.4 developing, 2.2 developing, 5.4 developing
costs debates » los debates, concepts debates
developing 1 » developing _, developing a, developing e
debates y » debates _, debate _, debate 3

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

• Adding a wildcard symbol may retrieve word variants: technology used information costs debates y communication cost 2.4 developing 1 africa.*.