Perhaps you should try some spelling variations:
telecommunications cost » telecommunication cost, telecommunication costa, telecommunications past
trade development » software development
development en » developpement en, development menu, development eco
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
cost trade » costs trade, costly trade, boost trade
11 ex » 11 e, 11 eu, 14 ex
1 ex » 1 sex, 14 ex, _ ex

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: "typology des variation ((1 ex) OR (11 ex)) _ telecommunications cost trade development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology des variation ((1 ex) OR (11 ex)) _ telecommunications cost trade development en afrique.*.