Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
del developpement » de developpement, des developpements, le developpement
4 communications » 14 communications, 4 communication, 2 communications
developpement en » developpement et, developpement des, developpement de
technology gaps » technology gap
inflation wages » inflation rates, inflation taxes, inflation targets
gaps inflation » has inflation, grade inflation, rapid inflation
wages race » wages trade, wage rate, wages case
costs del » costa del, costo del
race 4 » race _, rice 4, face 4

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

• Adding a wildcard symbol may retrieve word variants: technology gaps inflation wages race 4 communications costs del developpement en afrique.*.