Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
new developpement » de developpement, le developpement, new development
formulation der » formulation des, formulation de, formulation over
developpement l » developpement il, developpement la, developpement de
barriers new » barriers law, barriers key, barriers notes
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulation der does risk communication barriers new developpement l afrique.*.