Perhaps you should try some spelling variations:
communications pt » communication pt, communications _, communications a
typologies about » typologies art, typologie auf, typologies et
about variation » about radiation
d developpement » de developpement, du developpement, le developpement
developpement l » developpement il, developpement la, developpement de
variation der » variation des, variation bei, variation _
timss data » time data
der timss » does timss
l afrique » en afrique
pt d » pt 2, pt 1, pt 3

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

• Adding a wildcard symbol may retrieve word variants: typologies about variation der timss data communications pt d developpement l afrique.*.