Perhaps you should try some spelling variations:
oral communication » personal communication
trade information » price information, private information, trade integration
technology trade » technology trends, technology transfer, technology transfers
de development » e development, ce development, de developpement
information 1 » information 2, information 3, information 3.2
china afrique » china africa
costs de » costs _, costs 4, costs a
de oral » de otras, new oral
1 de » 1 die, 1 der, _ de

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

• Adding a wildcard symbol may retrieve word variants: technology trade information 1 de oral communication costs de development china afrique.*.