Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
vector development » sector development, sector developments, factor development
pt communication » put communication, et communication, post communication
relation 3.3.2 » relations 3.3.2, relation 5.3.2, relations 2.3.2
index action » index option, index options, index author
3.3.2 cross » 3.2.2 cross, 3.3 cross
cost vector » class vector, reset vector, short vector
cross pt » cross _, cross 1, cross c

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

• Adding a wildcard symbol may retrieve word variants: technology _ relation 3.3.2 cross pt communication cost vector development index action.*.