Perhaps you should try some spelling variations:
developed countries » developing countries
technology support » technology sector
support population » support operation, support operations, support education
oral communication » personal communication
countries africa » countries april, industries africa
population 2.3 » population _, population age
20 developed » 2.0 developed, _ developed, a developed
costs 20 » costs 60, costs 2.3, costs 2.1
6 oral » 16 oral, _ oral, 2 oral
2.3 6 » 2.3 _, 2.3 a, 2.3 e

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

• Adding a wildcard symbol may retrieve word variants: technology support population 2.3 6 oral communication costs 20 developed countries africa.*.