Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
technologies a » technologies _, technologies 4, technologies 2
consumption 19 » consumption 1, consumption 13, consumption 1910
a consumption » gas consumption, mean consumption, coal consumption
barriers au » barriers a, barriers aa, barriers law
19 diaries » 1193 diaries, 1892 diaries, 1922 diaries
diaries 4 » diaries _, diaries a, diaries 8.4

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

• Adding a wildcard symbol may retrieve word variants: technologies a consumption 19 diaries 4 communication barriers au developpement en afrique.*.