Perhaps you should try some spelling variations:
smes development » sme development, sms development, pme's development
development min » development main, development menu, development may
de variation » der variation, die variation, does variation
topology de » topology _, topology 32, topology 4
variation 6 » variation _, variations _, variation des
min afrique » en afrique
der tropen » den tropen, der treppen, die tropen
der open » der oper, der opec, der opfer
a smes » _ smes, 8 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: "topology de variation 6 ((der open) OR (der tropen)) communication a smes development min afrique.~".
• Adding a wildcard symbol may retrieve word variants: topology de variation 6 ((der open) OR (der tropen)) communication a smes development min afrique.*.