Perhaps you should try some spelling variations:
13.4.5 communication » 10.4.3 communication, 11.4.1 communication, 12.4.4 communication
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
technology gap » technology 1, technology 2.2, technology 3
inflation boys » inflation bias, inflation gross, inflation als
gap inflation » has inflation, grade inflation, rapid inflation
prices 13.4.5 » prices 3.4.2, prices 11.2.3, prices 11.3.1
boys prices » bonds prices, bond prices, goods prices
costs du » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology gap inflation boys prices 13.4.5 communication costs du developpement en afrique.*.