Perhaps you should try some spelling variations:
technological frontier » technology frontier
frontier information » further information, premier information, other information
information arts » information act, information als, information part
de communication » mobile communication, online communication
developing e » developing _, developing a, developing east
arts debate » art debate, prints debate, early debate
debate de » debates de, debate we, debatte der
e africa » em africa, de africa, eu 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 arts debate de communication costs _ developing e africa.*.