Perhaps you should try some spelling variations:
life using » life during
using data » missing data
yang jun » pang jun, yang jin, yang judy
yang jui » yang judy, yang di, yang xi
yang yue » wang yue, yang yun, wong yue
do chen » don chen, do when, goh chen
yang yi » yang di, yang xi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: life using data do chen ((yang jun) OR (yang jui)) ((((yang yue) OR (wang yan))) OR (yang yi)) ;~.
• Adding a wildcard symbol may retrieve word variants: life using data do chen ((yang jun) or (yang jui)) ((((yang yue) or (wang yan))) or (yang yi)) ;*.