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
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
5 power » 2 power, 3 power, 4 power
soe 4 » boe 4, ioe 4
sos 4 » qos 4, sds 4, ses 4

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 des variation _ ((soe 4) OR (sos 4)) communication 5 power development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology des variation _ ((soe 4) OR (sos 4)) communication 5 power development en afrique.*.