Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
inflation target » inflation targeting, inflation rate, inflation rates
technology flow » technology low, technology from, technology food
development lid » development led, development li, development lie
flow inflation » low inflation, food inflation, log inflation
target fish » target risk, market fish, target file
lid afrique » l afrique
fish 2.1 » fish 2.3, fish 3.1, fish 5.1

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

• Adding a wildcard symbol may retrieve word variants: technology flow inflation target fish 2.1 communication costs _ development lid afrique.*.