Perhaps you should try some spelling variations:
technological frontier » technology frontier
frontier information » further information, premier information, other information
de communication » mobile communication, online communication
information act » information age, information a, information about
developing de » developing e, developing ce, developing deep
act debate » art debate, arts debate, a debate
debate de » debates de, debate we, debatte der
de africa » does africa, de america, use africa

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

• Adding a wildcard symbol may retrieve word variants: technological frontier information act debate de communication costs _ developing de africa.*.