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
information 11.2 » information 1.2, information 15.2, information 11.3
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
11.2 do » 11.2 die, 11.2 das, 11.2 how
do oral » do rural, who oral

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

• Adding a wildcard symbol may retrieve word variants: technology trade information 11.2 do oral communication _ du developpement en afrique.*.