Perhaps you should try some spelling variations:
dong ryang » dong yang
dong hoang » hong hong
yang hui » yang jui, wang hui, yang muxi
hui ping » hui ying, chui ling, hui sin
ping shu » cong shu, ping ku, ping yu
a weit » a west, a soweit
a wei » ha wei, ma wei, a web
ryang » rryang
yan » ryan
yang » ryang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((dong ryang) or (dong hoang))) or (wang yan)) yet ((a wei) OR (a weit)) yang hui ping shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong ryang) OR (dong hoang))) OR (wang yan)) yet ((a wei) OR (a weit)) yang hui ping shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((dong ryang) or (dong hoang))) or (wang yan)) yet ((a wei) OR (a weit)) yang hui ping shu ;*".