Perhaps you should try some spelling variations:
theories development » theory development, fisheries development, calorie development
development scale » development stage, development small, development scaling
de communication » mobile communication, online communication
technology 4.2 » technology 2.2, technology 3.2, technology 4.1
costs theories » lists theorie, concepts theories, systems theories
4.2 relative » 2.2 relative, 1.2 relative, 3.2 relative
relative tea » relative sea, relative area, relative de
scale labor » male labor, slave labor, care labor
tea prices » real prices
prices de » prices does, prices _, prices a

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

• Adding a wildcard symbol may retrieve word variants: technology 4.2 relative tea prices de communication costs theories development scale labor.*.