Perhaps you should try some spelling variations:
sectors development » sector's development, sector development, sectoral development
development master » development matters, development chapter, development pattern
ec communication » de communication, 3 communication, 4 communication
technology use » technology 1, technology 2.2, technology 3
relation 3.3.2 » relations 3.3.2, relation 5.3.2, relations 2.3.2
costs sectors » across sectors, postal sectors, ets sectors
use relation » une relation, use regulation, die relation
3.3.2 crises » 3.3.2 cross, 3.3.2 krise, 3.3.2 cases
crises ec » crises et, crises eu, crises luc
err. » kerr., herr.

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

• Adding a wildcard symbol may retrieve word variants: technology use relation 3.3.2 crises ec communication costs sectors development master err.*.