Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
integration pork » integration work, integration post, integration report
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
und integration » grid integration, und interpretation
technology und » technology fund, technology used, technology use
pork trade » book trade, export trade, import trade
trade 6.2 » trade 2.2, trade 3.2, trade 4.2
costs du » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology und integration pork trade 6.2 communication costs du developpement de l'afrique.*.