Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
health gain » health goals
yan china » can china, dan china, han china
sang minh » kang minah, anh minh, song ming
young man » young men, young woman, young male
song min » song ming, gong min, jong min
wan yan » wang yan, nan yan, wai yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan china health gain ((sang minh) or (song min)) young man ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan china health gain ((sang minh) OR (song min)) young man ;.
• Adding a wildcard symbol may retrieve word variants: wan yan china health gain ((sang minh) or (song min)) young man ;*.