Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
calculations area » calculations based, calculations from, calculations prof
development model » development models, development middle
mine development » sme development, trade development, business development
technologies 2 » technologies _, technologies 4
2 calculations » _ calculations, 2 calculation, 1 calculations
costs mine » costs money, costs timing
area 5 » area _, area a
5 open » 2 open, 3 open

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 calculations area 5 open communication costs mine development model afrique.*.