Perhaps you should try some spelling variations:
country variables » control variables, country parable, country variance
developed country » developed countries, developing country
information lost » information loss, information cost, information list
a communication » la communication, data communication, data communications
technology 1 » technology _
lost decades » lost decade, last decades, last decade
10 developed » 1 developed, 2.0 developed, _ developed
decades a » decades _, decade _, decade 1
costs 10 » costs 1, costs 20, costs 60

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information lost decades a communication costs 10 developed country variables.*.