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
typologie does » typologie des, typologie der, typologie cices
does variablen » der variablen, die variablen, does variation
debt personals » des personals
und debt » fund debt, bond debt, und der
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 variablen und debt personals communication a et developpement durable afrique.*.