Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology trade » technology trends, technology transfer, technology transfers
trade insulation » trade regulation, grade inflation, trade innovation
insulation ratio » information ratio, inflation rate, inflation rates
developing lin » developing long, developing lean, developing lung
4 developing » 3 developing
ratio price » option price
lin afrique » en afrique, l afrique
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology trade insulation ratio price data communications costs 4 developing lin afrique.*.