Perhaps you should try some spelling variations:
chain information » can information, change information, domain information
information rates » information states, information ratio, information rules
8.1 communication » 4.1 communication, 1.1 communication, 3.1 communication
technology chain » technology can, technology china, technology changing
developing en » developing e, developing eq, developing egg
4 developing » 3 developing
rates age » rates aged, rates wage, rates have
age 8.1 » age 18.1, age 4.1, age 2.1
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology chain information rates age 8.1 communication costs 4 developing en afrique.*.