Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh trung » thanh trung, manh trung, danh trung
hanh trang » thanh trung, canh tranh, hanh trinh
tranh chap » tranh cua, trinh chat
dung cong » dung trong
san tranh » can tranh, lan tranh, san thanh
cong san » cong tac
va dung » van dung, va duong, vat dung

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 sang) or (chieu sach)) - ((hanh trung) OR (hanh trang)) va dung cong san tranh chap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu sach)) - ((hanh trung) OR (hanh trang)) va dung cong san tranh chap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (chieu sach)) - ((hanh trung) OR (hanh trang)) va dung cong san tranh chap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu sach)) - ((hanh trung) OR (hanh trang)) va dung cong san tranh chap*.