Perhaps you should try some spelling variations:
oral communication » personal communication
dams development » dam development, gas development, ads development
variation ment » variation test, variation among, variation des
development l » development li, development 1, development law
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
ment water » melt water, most water, peat water
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation ment water oral communication _ dams development l afrique.*.