Perhaps you should try some spelling variations:
china data » china update, chinese data
china dan » china den, china des, china due
zhong ghi » hong ghi, zhong zhi, zhong tai
yan guan » gan guan, yan yuan, yang guang
ji zhong » 2 zhong, wu zhong, yu zhong
wan yan » wang yan, nan yan, wai yan
yang ji » yang jui, yang jie, yang jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan guan ((china dan) or (china data)) yang ji zhong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan guan ((china dan) OR (china data)) yang ji zhong ghi ;.
• Adding a wildcard symbol may retrieve word variants: wan yan guan ((china dan) or (china data)) yang ji zhong ghi ;*.