Perhaps you should try some spelling variations:
2.2.5.7 communication » 2.2.5.4 communication, 2.2.3 communication, 2.3.1.1 communication
communication case » communications case, communication based, communication phase
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
technology gap » technology 1, technology 2.2, technology 3
prices 2.2.5.7 » prices 2.2.2, prices 2.3.5
gap inflation » has inflation, grade inflation, rapid inflation
inflation und » inflation index, inflation _, inflation tax
und prices » fund prices, land prices, bond prices
de afrique » de l'afrique, en afrique, l afrique
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 2.2.5.7 communication case au developpement de afrique.*.