Perhaps you should try some spelling variations:
communications series » communication series, communications services, communication services
paper communications » power communication, face communications, layer communication
its transformation » et transformation, als transformation, eas transformation
mine development » sme development, trade development, business development
technology its » technology isst, technology ict, technology ii
development de » development d, development ds, developpement de
series mine » series minor, series ein, series index
de africa » does africa, de america, use africa
a paper » _ paper, i paper, ii paper

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

• Adding a wildcard symbol may retrieve word variants: technology its transformation _ a paper communications series mine development de africa.*.