Perhaps you should try some spelling variations:
oral communication » personal communication
das developpement » des developpements, de developpement, du developpement
developpement la » developpement de, developpement et, developpement du
des variations » les variations, does variation, its variations
theorie des » theorie der
la afrique » l afrique, la fabrique, en afrique
its oral » its oil, u.s oral, vs oral
a das » 1 das, 2 das, 3 das

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

• Adding a wildcard symbol may retrieve word variants: theorie des variations _ its oral communication a das developpement la afrique.*.