Perhaps you should try some spelling variations:
trip taiwan » taipei taiwan, tariff taiwan, trade taiwan
long trip » longer trip, long tail, longer trips
china auf » china aus, china a, china air
yang july » yang judy, yang jun
yang jui » yang judy, yang di, yang yi
wing hua » wang hua, ming hua, ying hua
yang xi » yang di, yang yi

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: long trip taiwan china auf ((((yang jui) OR (yang xi))) OR (yang july)) wing hua ;~.
• Adding a wildcard symbol may retrieve word variants: long trip taiwan china auf ((((yang jui) or (yang xi))) or (yang july)) wing hua ;*.