Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does development » dams development, ides development, smes development
communication 4 » communication _, communication a, communication 3
development la » development law, development li, development land
variation 6 » variation _, variations _, variation des
la afrique » l afrique, la fabrique, en afrique
dr opec » der opec, der oper, des opec
4 does » 2 does
6 dr » 6 der, 16 dr, _ dr

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation 6 dr opec communication 4 does development la afrique.*.