Perhaps you should try some spelling variations:
online communication » mobile communication, business communication, mobile communications
technology theory » technology thesis, technology other, technology history
rate developments » trade developments, price developments, site development
developments from » development from, developments after, developments _
theory extension » theory extensions, theory tension, theory attention
extension from » expansion from, extinction from, extension how
costs rate » costs water, costs case, costs data
de online » der online, des online, die online
from care » from case, from cape, from cash
from de » from dem, from deep

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

• Adding a wildcard symbol may retrieve word variants: technology theory extension from de online communication costs rate developments from care.*.