Perhaps you should try some spelling variations:
developing controlled » developing control, developing countries
information last » information list, information lost, information law
a communication » la communication, data communication, data communications
60 developing » 10 developing, 20 developing, 90 developing
technology 1 » technology _
last decades » last decade, lost decade, past decade
decades a » decades _, 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 last decades a communication costs 60 developing controlled trials.*.