Perhaps you should try some spelling variations:
khong thuong » thong thuong, hang thuong, cong thuong
chieu sach » chiet tach, chieu sang, chieu xanh
thuong dan » huong dan, thuong han, thuong dam
trung hoa » trung ha
trung hoc » trung quoc
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chinh sach)) - thanh ((trung hoa) OR (trung hoc)) khong thuong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - thanh ((trung hoa) OR (trung hoc)) khong thuong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - thanh ((trung hoa) OR (trung hoc)) khong thuong dan than cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - thanh ((trung hoa) OR (trung hoc)) khong thuong dan than cao*.