Perhaps you should try some spelling variations:
u.s communications » 3.1 communications, les communications, nps communications
trade information » price information, private information, trade integration
due developpement » de developpement, du developpement, le developpement
technology trade » technology trends, technology transfer, technology transfers
communications a » communications _, communications law, communications media
information 2.2 » information 1.2, information 2.7, information 2.2.2
des afrique » en afrique, de l'afrique
der u.s » over u.s, year u.s
a due » a die, _ due, 1 due

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

• Adding a wildcard symbol may retrieve word variants: technology trade information 2.2 der u.s communications a due developpement des afrique.*.