Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement en » developpement et, developpement des, developpement de
technology gaps » technology gap
gaps inflation » has inflation, grade inflation, rapid inflation
inflation tax » inflation rate, inflation _, inflation target
tax prices » gas prices, car prices, tax practices
prices 3.1 » prices 2.1, prices 3.2, prices 2.3.1
costs leur » costs clear

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

• Adding a wildcard symbol may retrieve word variants: technology gaps inflation tax prices 3.1 communication costs leur developpement en afrique.*.