Perhaps you should try some spelling variations:
first vaccination » hiv vaccination, first valuation, et vaccination
typologies first » typologies art, typologie fur, typologie wird
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
vaccination des » vaccination en, vaccination rates, vaccination step
der risk » under risk, der risiko, der ring
des der » des dr, des ddr, des dem

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

• Adding a wildcard symbol may retrieve word variants: typologies first vaccination des der risk communication _ le developpement en afrique.*.