Perhaps you should try some spelling variations:
yuan fang » yan fang, nan fang, yuan ming
yuan yang » yuan ying, yuan yan, dan yang
guan hua » guan huai, guan huah, guang hua
dai tan » dai tang, dai tian, dai han
hua hui » chua hui, huan hui, phua hui
hui di » hui ji, hui de, hui li
di dai » di dati, li dai, yi dai
de di » de yi, de ji, de qi
de li » de la, de yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((yuan fang) OR (yuan yang)) hui di dai tan wen da xi. ) or ( guan hua hui ((de di) or (de li)) san wen da xi. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((yuan fang) OR (yuan yang)) hui di dai tan wen da xi. ) OR ( guan hua hui ((de di) OR (de li)) san wen da xi. ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((yuan fang) OR (yuan yang)) hui di dai tan wen da xi. ) or ( guan hua hui ((de di) or (de li)) san wen da xi. ))*".