Perhaps you should try some spelling variations:
rural communications » oral communication, rural telecommunications, cultural communications
communications gross » communications cross, communication cross, communications costs
trade developpement » trade developement, trade development, de developpement
developpement en » developpement et, developpement des, developpement de
typologien de » typologien der, typologie des, typologie der
de variation » der variation, die variation, does variation
gross trade » goods trade, crops trade, growth trade
etc rural » etc moral

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

• Adding a wildcard symbol may retrieve word variants: typologien de variation _ etc rural communications gross trade developpement en afrique.*.