Perhaps you should try some spelling variations:
communications ana » communications aa, communications a, communications can
typologies 6.3.5 » typologies 16.4.1, typologies 2.3, typologies 2.5
da developpement » de developpement, du developpement, le developpement
developpement de » developpement des, developpement durable
6.3.5 variation » 3.3 variation, 6.4 variation
variation bei » variation des, variation der, variation _
timss data » time data
de afrique » de l'afrique, en afrique, l afrique
bei timss » b timss

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

• Adding a wildcard symbol may retrieve word variants: typologies 6.3.5 variation bei timss data communications ana da developpement de afrique.*.