Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
hanh tranh » canh tranh, hanh trinh, hanh trang
phong van » phung van, thong van, phong va
cua nung » cua nhung, cua nong, cua nang
ca nung » cua nhung, va nhung, tay nung
van tan » van tuan, van ban, van tai
tan cao » toan cao, tao cao, tay 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 xanh)) - hanh tranh ((cua nung) or (ca nung)) phong van tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu xanh)) - hanh tranh ((cua nung) OR (ca nung)) phong van tan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu xanh)) - hanh tranh ((cua nung) or (ca nung)) phong van tan cao*.