Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
chuc hach » chuc hanh, thuc hanh, chuc danh
tung quan » tuong quan, trung quan, dung quan
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
tan hanh » tan thanh, tang hanh, toan hanh
hanh cau » nhanh cau, hang cau, hanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc hach) or (chieu sach)) - thanh tung quan ((hang cong) OR (bang cong)) tan hanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc hach) OR (chieu sach)) - thanh tung quan ((hang cong) OR (bang cong)) tan hanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc hach) or (chieu sach)) - thanh tung quan ((hang cong) OR (bang cong)) tan hanh cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc hach) or (chieu sach)) - thanh tung quan ((hang cong) OR (bang cong)) tan hanh cau*.