Perhaps you should try some spelling variations:
changed china » change china, exchanges china, exchange china
china young » china ying, child young, china yang
long thanh » luong thanh, long han, long trinh
young john » kong john, wong john, young jean
a changed » _ changed, a change, has changed
bonn shin » song shin, bonn mein
bonn ein » bonn mein, bonn die, kann ein
thanh a » than a, thanh _, thanh dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: long thanh a changed china young john ((bonn shin) or (bonn ein)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: long thanh a changed china young john ((bonn shin) OR (bonn ein)) ;.
• Adding a wildcard symbol may retrieve word variants: long thanh a changed china young john ((bonn shin) or (bonn ein)) ;*.