Perhaps you should try some spelling variations:
personals communication » personal communication, personal communications, personal communicator
developpement durable » developpement de
et developpement » de developpement, le developpement, test development
variation using » variations during, variation und, variation among
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
debt personals » des personals
using debt » housing debt, rising debt, using delta
a et » a set, a net, a bet

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

• Adding a wildcard symbol may retrieve word variants: typologie does variation using debt personals communication a et developpement durable afrique.*.