Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
data communication » data communications
models development » model development, module development, model developments
relations under » relations united, equations under, obligations under
technology 2.2 » technology _, technology 1, technology 3
2.2 relations » 1.2 relations, 2.4 relations, 2.2 relational
costa models » cost models, cost model, copula models
china data » china update, chinese data
under age » older age, under a
age data » wage data, cge data, image data

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

• Adding a wildcard symbol may retrieve word variants: technology 2.2 relations under age data communication costa models development china data.*.