Perhaps you should try some spelling variations:
technology sector » technology series, technology social
sector functional » sector functions, aspects functional, der functional
eu communication » ec communication, et communication, de communication
2.3 development » 2 development, 2015 development, 1 development
functional gas » functional case, functional areas, functional based
development de » development d, development ds, developpement de
costs 2.3 » costs 4.2, costs 4.4
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: technology sector functional gas non eu communication costs 2.3 development de africa.*.