Perhaps you should try some spelling variations:
power development » water development, career development, hydropower development
communication 5 » communication _, communication a, communication 3
development en » developpement en, development menu, development eco
de variation » der variation, die variation, does variation
variation im » variation _, variation 6, variation des
typology de » typology _, typology 6, typology a
5 power » 2 power, 3 power, 4 power
soe 3 » so 3, soa 3, soe 4
ioe 3 » i.e 3, ioe 4, ioe 6

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: "typology de variation im ((soe 3) OR (ioe 3)) communication 5 power development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology de variation im ((soe 3) OR (ioe 3)) communication 5 power development en afrique.*.