Perhaps you should try some spelling variations:
studies uber » studie uber, studien uber, studies unter
3 studies » 2 studies
main hong » min hong, tan hong, tin hong
yang jui » yang judy, yang yi
uber das » uber die, uber den
das main » its main, das mass, das max
yang xi » yang yi
tan » than

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: ((((((yang jui) OR (yang xi))) OR (yang dean))) OR (yang di))a 3 studies uber das main hong tan ;~.
• Adding a wildcard symbol may retrieve word variants: ((((((yang jui) or (yang xi))) or (yang dean))) or (yang di))a 3 studies uber das main hong tan ;*.