Perhaps you should try some spelling variations:
china communications » china communication, china's communications, chile communications
developpement de » developpement des, developpement durable
der variation » de variation, does variation, die variation
variation 3 » variation _, variation 6, variation 5
gas china » gas chain, giants china
11 des » 11 does, 11 der, 11 das
3 gas » _ gas, 2 gas
11 de » 11 die, 11 der, 31 de
theorie » theories

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theorie der variation 3 gas china communications ((11 de) OR (11 des)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation 3 gas china communications ((11 de) OR (11 des)) developpement de l'afrique.*.