Perhaps you should try some spelling variations:
communication cote » communication costs, communication costa, communication case
leur developpement » le developpement, deux developpements, de developpement
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
interaction term » interaction _
3.1 interaction » 3.2 interaction, 3 interaction, 2 interaction
developpement l » developpement il, developpement la, developpement de
technology 3.1 » technology 1, technology 2.2, technology _
trade 2.2 » trade 3.2, trade 4.1
cote leur » cote les
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: technology 3.1 interaction term trade 2.2 communication cote leur developpement l afrique.*.