Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trong dan » trong dang, trong san, trong tan
hanh ban » thanh ban, hang ban, hanh san
vat dung » van dung, va dung, viet dung
gian ban » gian bana, gian dan, gian lan
ban vat » bang vat, ben vat, ban va

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 (((chieu sang) OR (hieu lang)))) - hanh ban vat dung trong dan gian ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (((chieu sang) OR (hieu lang)))) - hanh ban vat dung trong dan gian ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (((chieu sang) OR (hieu lang)))) - hanh ban vat dung trong dan gian ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (((chieu sang) OR (hieu lang)))) - hanh ban vat dung trong dan gian ban*.