Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
chieu xanh » chieu tinh, hieu manh
hanh trang » thanh trung, canh tranh, hanh trinh
hang nong » thang long, han tong
trang va » tran van, hang va
nong van » song van, nong dan, nong san
va hang » van hang, va nang, va lang
van tao » van thao, vang tao, van tai
tao cao » bao cao, toan cao

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 (chieu xanh)))) - hanh trang va hang nong van tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (((chieu sang) OR (chieu xanh)))) - hanh trang va hang nong van tao cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (((chieu sang) or (chieu xanh)))) - hanh trang va hang nong van tao cao*.