Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
down development » town development, grown development, loan development
inflation rates » inflation rate
development lid » development led, development li, development lie
technology 1 » technology _
1 inflation » 10 inflation, 12 inflation, _ inflation
lid afrique » l afrique
rates rule » bayes rule, rate rules, rates reduce
costs down » costs how
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 1 inflation rates rule 4.2 communication costs down development lid afrique.*.