Perhaps you should try some spelling variations:
leading change » leading cause
yeung leading » years leading
china who » china why, china what, china won
yang jie » yang jin, yang di, yang xi
yang jui » yang judy, yang di, yang xi
tong hui » wang hui
jing ji » ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: yeung leading change china who ((jing ji) or (((yang jie) OR (yang jui)))) tong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yeung leading change china who ((jing ji) OR (((yang jie) OR (yang jui)))) tong hui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yeung leading change china who ((jing ji) or (((yang jie) OR (yang jui)))) tong hui ;*".