Perhaps you should try some spelling variations:
vector development » sector development, sector developments, factor development
communication cost » communication costs, communication costa, communications costs
technology class » technology glass, technology case, technology cross
de communication » mobile communication, online communication
class relations » les relations, class recreation
relations 15.2 » relations 1.2, relations 5.2, relations 1592
15.2 crisis » 10.2 crisis, 13.2 crisis, 1.1 crisis
cost vector » class vector, reset vector, short vector
crisis de » crisis del, crisis due, crisis debt

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

• Adding a wildcard symbol may retrieve word variants: technology class relations 15.2 crisis de communication cost vector development _ aortic.*.