Perhaps you should try some spelling variations:
sach danh » sach tranh, sach dao, sach dung
cong thai » cong hai, cong thanh, cong tac
hong thai » hong ha, hinh thai
sach ngan » sach ngon, sach nha, sach han
hang khi » bang khi, hang khoa, dang khoi
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach danh ((cong thai) OR (hong thai)) đong luc ) or ( su sach ngan hang khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach danh ((cong thai) OR (hong thai)) đong luc ) OR ( su sach ngan hang khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach danh ((cong thai) OR (hong thai)) đong luc ) or ( su sach ngan hang khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach danh ((cong thai) OR (hong thai)) đong luc ) or ( su sach ngan hang khi đong luc ))*.