Perhaps you should try some spelling variations:
developing controlled » developing control, developing countries
information past » information part, information pt, information pack
a communication » la communication, data communication, data communications
60 developing » 10 developing, 20 developing, 90 developing
technology 1 » technology _
past decade » last decade, lost decade, first decade
decade a » decades a, decade _, decade 1
costs 60 » costs 20, costs 6.4, costs 168
trials. » trial.

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information past decade a communication costs 60 developing controlled trials.*.