Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
des developpement » des developpements, de developpement, le developpement
technology 10 » technology 110, technology 1, technology 11
inflation tax » inflation rate, inflation _, inflation target
10 inflation » 12 inflation, 10.7 inflation, _ inflation
des afrique » en afrique, de l'afrique
tax prices » gas prices, car prices, tax practices
prices 4.1 » price 4.1, prices 2.1, prices 3.1
phase des » phasen des, phase der

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

• Adding a wildcard symbol may retrieve word variants: technology 10 inflation tax prices 4.1 communication phase des developpement des afrique.*.