Perhaps you should try some spelling variations:
john michael » toman michael, keen michael
michael yun » michael young, michael ian, michael n
dang hadi » dang hai
yun chen » yung chen, yu chen, yuan cheng
yang jin » yang jie, yang jun, ying jin
yang xi » yang jui
yang yi » yang jui
dugan » duggan, dusan, duran

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

• Performing a fuzzy search may retrieve terms with similar spellings: dugan john michael yun chen ((((yang xi) or (yang jin))) or (((yang di) or (yang yi)))) dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dugan john michael yun chen ((((yang xi) OR (yang jin))) OR (((yang di) OR (yang yi)))) dang hadi ;.
• Adding a wildcard symbol may retrieve word variants: dugan john michael yun chen ((((yang xi) or (yang jin))) or (((yang di) or (yang yi)))) dang hadi ;*.