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

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