Perhaps you should try some spelling variations:
mental development » mineral development, capital development, spatial development
technology german » technology germany, technology thermal, technology human
de communication » mobile communication, online communication
development east » development southeast, development 1
german position » germany's position, german politics, german edition
east afrique » east africa, east african, en afrique

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: "technology german position ((a a) OR (a la)) de communication _ mental development east afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology german position ((a a) OR (a la)) de communication _ mental development east afrique.*.