Perhaps you should try some spelling variations:
u.s communications » 3.1 communications, les communications, nps communications
des developpements » deux developpements, de developpement, et developpements
trade information » price information, private information, trade integration
developpements la » developpement la, developpements de, developpement de
technology trade » technology trends, technology transfer, technology transfers
communications a » communications _, communications law, communications media
la afrique » l afrique, la fabrique, en afrique
der u.s » over u.s, year u.s
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: technology trade information _ der u.s communications a des developpements la afrique.*.