Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
pt communication » put communication, et communication, post communication
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
formal labor » rural labor, local labor, total labor
barriers au » barriers a, barriers aa, barriers law
labor done » labor code, labor cote, labor die
done pt » one pt, done part, done get

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

• Adding a wildcard symbol may retrieve word variants: technologien _ formal labor done pt communication barriers au developpement en afrique.*.