Perhaps you should try some spelling variations:
china communications » china communication, china's communications, chile communications
trade development » software development
communications a » communications _, communications law, communications media
does variation » de variation, der variation, die variation
theorie does » theorie des, theorie der, theorie die
variation 6 » variation _, variations _, variation des
6 how » _ how, 2 how, 3 how

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

• Adding a wildcard symbol may retrieve word variants: theorie does variation 6 how china communications a trade development 1 africa.*.