Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
der developpement » de developpement, des developpements, leur developpement
technology trade » technology trends, technology transfer, technology transfers
de communication » mobile communication, online communication
developpement en » developpement et, developpement des, developpement de
regulation das » regulation des, regulation case, regulation data
das prices » gas prices, gas price, do prices
prices de » prices does, prices _, prices a

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

• Adding a wildcard symbol may retrieve word variants: technology trade regulation das prices de communication phase der developpement en afrique.*.