Perhaps you should try some spelling variations:
technologies trade » technology trade, technologies case, technologies table
oral communication » personal communication
trade information » price information, private information, trade integration
development case » development china
de development » e development, ce development, de developpement
costs de » costs _, costs 4, costs a
de oral » de otras, new oral

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

• Adding a wildcard symbol may retrieve word variants: technologies trade information _ de oral communication costs de development case afrique.*.