Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
hong bang » dong bang, hang ban, hong hanh
he nhung » hee nhung, me nhung, hien nhung
ve nhung » va nhung, tu nhung
cong ban » cong bang, cong san, cong tan
han tai » hang tai, nhan tai, van tai

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 - canh tranh ((he nhung) OR (ve nhung)) ((cong ban) or (hong bang)) han tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh tranh ((he nhung) OR (ve nhung)) ((cong ban) OR (hong bang)) han tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - canh tranh ((he nhung) OR (ve nhung)) ((cong ban) or (hong bang)) han tai".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh tranh ((he nhung) OR (ve nhung)) ((cong ban) or (hong bang)) han tai*.