Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
thanh toan » thanh hoa, thanh san, tinh toan
trinh chu » trinh cau, trinh cho, trinh thuc
hang cong » dang cong, hang nong, bang cong
manh toan » anh tuan, tinh toan
chu hang » chu han, thu hang, cho hang

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

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