Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
trade development » software development
inflation target » inflation targeting, inflation rate, inflation rates
technology u.s » technology uses, technology 2.2, technology use
u.s inflation » und inflation, 2.3 inflation, 3.2 inflation
target rule » targets rule, target rate, target file
costs trade » costly trade
1 afrique » l afrique, en afrique, 1 enrique
rule 4.2 » rules 4.2, rule 2.2, rule 3.2

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

• Adding a wildcard symbol may retrieve word variants: technology u.s inflation target rule 4.2 communication costs trade development 1 afrique.*.