Perhaps you should try some spelling variations:
trinh tinh » trinh kinh, trinh tin, trinh sinh
trinh dinh » trinh kinh, trinh sinh, trinh dung
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
cong cong » trong cong, dung cong, dang cong
tinh cua » trinh cua, sinh cua, tinh chat
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((trinh tinh) or (trinh dinh)) - nhanh tinh cua ((cong cong) OR (cong dong)) san than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((trinh tinh) OR (trinh dinh)) - nhanh tinh cua ((cong cong) OR (cong dong)) san than cap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((trinh tinh) or (trinh dinh)) - nhanh tinh cua ((cong cong) OR (cong dong)) san than cap*".