Perhaps you should try some spelling variations:
power development » water development, career development, hydropower development
communication 2 » 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
soe 4 » boe 4, sos 4
ioe 4 » boe 4, io 4, ioe 3

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 4) OR (ioe 4)) communication 2 power development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology de variation im ((soe 4) OR (ioe 4)) communication 2 power development en afrique.*.