Perhaps you should try some spelling variations:
john mchale » john michael, john charles
tuman john » dugan john, tian john, turn john
dang hadi » dang hai
yu cheng » yu chen, _ cheng
yang jin » yang jie, yang jun, ying jin
yang li » yang lin, yang xi, tang li
yang yi » yang xi, 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: tuman john mchale yu cheng ((((yang li) OR (yang jin))) OR (((yang di) OR (yang yi)))) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: tuman john mchale yu cheng ((((yang li) or (yang jin))) or (((yang di) or (yang yi)))) dang hadi ;*.