Perhaps you should try some spelling variations:
communications a » communications _, communications law, communications media
iere development » here development, care development, core development
development eco » development second, development east, development menu
des variation » does variation, de variation, der variation
variation der » variation des, variation bei, variation _
typology des » typologie des, typologie der, typology _
eco afrique » en afrique
au tchad » du tchad
a chad » _ chad, a chat
a iere » la biere, sa biere

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

• Performing a fuzzy search may retrieve terms with similar spellings: typology des variation der ((a chad) OR (au tchad)) communications a iere development eco afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "typology des variation der ((a chad) OR (au tchad)) communications a iere development eco afrique.*".