Perhaps you should try some spelling variations:
sector developments » sector development, recent developments
phase communication » change communication, based communication, face communication
communication cost » communication costs, communication costa, communications costs
technology social » technology series
social relations » fiscal relations, social pensions
relations 3.4 » relations 3.1, relations 3.2, relations 2.4
crisis phase » crisis part
cost sector » cost vector, port sector, forest sector
3.4 crisis » 3.1 crisis, 3.2 crisis, 3.5.4 crisis

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

• Adding a wildcard symbol may retrieve word variants: technology social relations 3.4 crisis phase communication cost sector developments _ artic.*.