Perhaps you should try some spelling variations:
personal communication » interpersonal communication
au developpement » du developpement, de developpement, le developpement
developpement il » developpement de, developpement et, developpement du
variation delay » variation des, variation der, variation de
typologien die » typologien der, typologie des, typologie der
die variation » de variation, does variation, der variation
delay factors » dietary factors, demand factors, key factors
il afrique » l afrique, en afrique
a au » a auf, a bau, a aus

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

• Adding a wildcard symbol may retrieve word variants: typologien die variation delay factors personal communication a au developpement il afrique.*.