Perhaps you should try some spelling variations:
china past » china 21st
wang hong » wang yong, wang hyoung, wang lihong
hong gang » gong gang, hong wang, hong kong
china pei » china peo, china pim, china peilei
china pt » china part, china path, china post
tong hui » wang hui
di tong » hui tong, xin tong
yang » lang

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: wang hong gang ((china pei) OR (((china pt) OR (china past)))) yang di tong hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong gang ((china pei) or (((china pt) OR (china past)))) yang di tong hui ;~".
• Adding a wildcard symbol may retrieve word variants: wang hong gang ((china pei) or (((china pt) OR (china past)))) yang di tong hui ;*.