Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
methodology issues » methodologies issues, methodological issues, methodology mission
issues situation » issues section, issues education
developpement en » developpement et, developpement des, developpement de
situation und » situation _, situation der
taxis mobile » tariffs mobile, das mobile, mail mobile
und taxis » und praxis, und tabus, und tarif

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

• Adding a wildcard symbol may retrieve word variants: methodology issues situation und taxis mobile communications costs _ developpement en afrique.*.