Perhaps you should try some spelling variations:
developed country » developed countries, developing country
country variables » control variables, country parable, country variance
information last » information list, information lost, information law
technology 1 » technology _
last decades » last decade, lost decade, past decade
1 developed » _ developed, a developed, 4 developed
costs 1 » costs _, costs 4, costs a

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

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