Perhaps you should try some spelling variations:
development phases » development phase, development cases, development plans
models development » model development, module development, model developments
technology trade » technology trends, technology transfer, technology transfers
de communication » mobile communication, online communication
communication en » communications en, communication et, communication el
trade relations » trade regulation
phases africa » cases africa, passes africa, changes africa
crisis de » crisis del, crisis due, crisis debt
en models » mean models, when models, can models

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

• Adding a wildcard symbol may retrieve word variants: technology trade relations _ crisis de communication en models development phases africa.*.