Perhaps you should try some spelling variations:
overview motivation » overview motivations, overview location, overview population
communication costa » communication costs, communications costs, communication cote
date communication » data communication, data communications, parte communication
motivation wages » motivation case, motivation des, motivation les
e developpements » et developpements, des developpements, de developpement
developpements l » developpements de, developpement il, developpement la
wages trade » wages race, wharves trade, states trade
trade date » trade data, matrade dato
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: methods overview motivation wages trade date communication costa e developpements l afrique.*.