Perhaps you should try some spelling variations:
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
technology grade » technology trade, technology guides, technology gender
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
grade inflation » price inflation, trade information
inflation rates » inflation rate
rates prices » water prices, gate prices, wages prices
prices 3.1 » prices 2.1, prices 3.2, prices 2.3.1

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

• Adding a wildcard symbol may retrieve word variants: technology grade inflation rates prices 3.1 communications _ au developpement en afrique.*.