Perhaps you should try some spelling variations:
u.s communications » 3.1 communications, les communications, nps communications
leur developpement » le developpement, deux developpements, de developpement
trade information » price information, private information, trade integration
technology trade » technology trends, technology transfer, technology transfers
communications a » communications _, communications law, communications media
developpement de » developpement des, developpement durable
information pt » information part, information 1, information 1.2
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology trade information pt _ u.s communications a leur developpement de afrique.*.