Perhaps you should try some spelling variations:
communication barriere » communication barriers, communication series, communication based
der developpement » de developpement, des developpements, leur developpement
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
technology 1 » technology _
barriere der » barrieren der, barrieren des, barriera di
1 inflation » 10 inflation, 12 inflation, _ inflation
price 4 » price _, price 3, price a

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

• Adding a wildcard symbol may retrieve word variants: technology 1 inflation _ price 4 communication barriere der developpement en afrique.*.