Perhaps you should try some spelling variations:
duong vuong » duong truong, duong trong, tuong duong
huong vuong » hung vuong, hong vuong, luong vuong
chieu sach » chinh sach, chieu sang, chieu xanh
manh toan » thanh toan, anh tuan, tinh toan
hanh ban » thanh ban, hang ban, hanh san
toan ban » van ban
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chiet tach)) - hanh ban cua ((huong vuong) OR (duong vuong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - hanh ban cua ((huong vuong) OR (duong vuong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chiet tach)) - hanh ban cua ((huong vuong) OR (duong vuong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chiet tach)) - hanh ban cua ((huong vuong) OR (duong vuong)) manh toan ban*.