Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
del developpement » de developpement, des developpements, le developpement
technology trade » technology trends, technology transfer, technology transfers
developpement de » developpement des, developpement durable
integration age » integration wage, integration a, integration als
de afrique » de l'afrique, en afrique, l afrique
costa del » costo del, costa e, cose del
age race » wages race, age range, cane race
race 4.1 » race 4.10, rice 4.1, race 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration age race 4.1 communication costa del developpement de afrique.*.