Perhaps you should try some spelling variations:
informal communications » informal communication, internal communications, information communications
communications media » communication media, communication india, communications series
do developpement » de developpement, du developpement, le developpement
developpement en » developpement et, developpement des, developpement de
variation crops » variation crop, variation across, variations across
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
5.3 informal » 3.3 informal, 4.3 informal, 5.1 informal
crops 5.3 » crops 1.3, crops 6.3, crops 3.5.3
media do » media die, media das, media der

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation crops 5.3 informal communications media do developpement en afrique.*.