Perhaps you should try some spelling variations:
oral communication » personal communication
developpement de » developpement des, developpement durable
des variablen » der variablen, die variablen, und variablen
variablen aid » variablen und, variablen a, variablen aa
de afrique » de l'afrique, en afrique, l afrique
does oral » does formal, does oil
aid does » card does, aid days, aid do
2 du » 2 zu, 2 eu, 2 do
2 de » 2 die, 2 der, _ de
typologie » typologies, typology

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

• Performing a fuzzy search may retrieve terms with similar spellings: typologie des variablen aid does oral communication ((2 du) OR (2 de)) developpement de afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie des variablen aid does oral communication ((2 du) OR (2 de)) developpement de afrique.*".