Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
mine developpement » mine development, de developpement, le developpement
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
developpement en » developpement et, developpement des, developpement de
technology 4.2 » technology 2.2, technology 3.2, technology 4.1
4.2 inflation » 3.2 inflation, 12 inflation, 2.3 inflation
inflation das » inflation bias, inflation tax, inflation a
costa mine » d'costa eine
coase 6.2 » case 6.2, coast 4.2, coast 6.1

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

• Adding a wildcard symbol may retrieve word variants: technology 4.2 inflation das coase 6.2 communication costa mine developpement en afrique.*.