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
inflation tax » inflation rate, inflation _, inflation target
technology 1 » technology _
1 inflation » 10 inflation, 12 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 1 inflation tax prices 4.1 communication phase des developpement des afrique.*.