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 der » situation _
das mobile » does mobile, a mobile
der das » oder das, der daf, der dax

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

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