Perhaps you should try some spelling variations:
telecommunications crop » telecommunications area, telecommunications cell, telecommunications cost
trade development » software development
development en » developpement en, development menu, development eco
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
crop trade » crops trade, crop storage
6 sex » _ sex, 4 sex, a sex
6 ex » _ ex, 1 ex, 4 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: "typologie de variation ((6 ex) OR (6 sex)) _ telecommunications crop trade development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation ((6 ex) OR (6 sex)) _ telecommunications crop trade development en afrique.*.