Perhaps you should try some spelling variations:
oral communication » personal communication
typologie cices » typologie eines, typologie des
cices variation » price variation, die variation, does variation
variation 6 » variation _, variations _, variation des
des afrique » en afrique, de l'afrique
debt oral » debt moral, debt oil
6 debt » 3 debt, 4 debt
2 du » 2 zu, 2 eu, 2 do
2 de » 2 die, 2 der, _ de

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 cices variation 6 debt oral communication ((2 du) OR (2 de)) developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie cices variation 6 debt oral communication ((2 du) OR (2 de)) developpement des afrique.*.