Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
development des » development does, development desd, development ds
ideologie und » theologie und, okologie und
und variation » und variationen, 2 variation, 4 variation
variation des » variation _, variation 6, variation series
des afrique » en afrique, de l'afrique
des deas » des des, des degats, des delays
a sme » 3 sme, 5 sme, a see
_ sme » _ smes

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ideologie und variation des deas voice communication ((a sme) OR (_ sme)) development des afrique.~".
• Adding a wildcard symbol may retrieve word variants: ideologie und variation des deas voice communication ((a sme) OR (_ sme)) development des afrique.*.