Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
data communication » data communications
models development » model development, module development, model developments
development case » development china
relations das » relations data, relations a, relations der
technology e » technology 1, technology 3, technology 4
e relations » 3 relations, 1 relations, des relations
cost models » cost model, logit models
ozone data » phone data
das ozone » das one
case six » case s0, case sub

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

• Adding a wildcard symbol may retrieve word variants: technology e relations das ozone data communication cost models development case six.*.