Perhaps you should try some spelling variations:
migrant health » immigrant health, infant health
health gain » health goals
yang liang » wang liang, yan liang, yang yang
wenn man » kann man, wenn das
yang jin » yang jie, yang jun, ying jin
ann man » kann man
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wenn man) or (ann man)) migrant health gain ((yang liang) or (yang jin)) dang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wenn man) OR (ann man)) migrant health gain ((yang liang) OR (yang jin)) dang hai ;.
• Adding a wildcard symbol may retrieve word variants: ((wenn man) or (ann man)) migrant health gain ((yang liang) or (yang jin)) dang hai ;*.