Perhaps you should try some spelling variations:
6.2.4.1 communication » 6.2.4.2 communication, 6.2.4.3 communication, 11.4.1 communication
communication case » communications case, communication based, communication phase
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technology gap » technology 1, technology 2.2, technology 3
prices 6.2.4.1 » prices 2.2.5.7, prices 2.3.1
gap inflation » has inflation, grade inflation, rapid inflation
inflation und » inflation index, inflation _, inflation tax
und prices » fund prices, land prices, bond prices
case au » case a, case all

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

• Adding a wildcard symbol may retrieve word variants: technology gap inflation und prices 6.2.4.1 communication case au developpement en afrique.*.