Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
3.2 communication » 3 communication, 2.3 communication, de communication
about development » youth development, port development, post development
development life » development level, development law, development latin
inflation tax » inflation rate, inflation _, inflation target
life afrique » life africa, l afrique
cost about » out about, just about, best about
tax case » tax cases, tax base, tax bases
case 3.2 » case 4.2, case 3.1, case 5.2

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation tax case 3.2 communication cost about development life afrique.*.