Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu xanh, hieu cach
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dung dung » ung dung, dung ung, dung dong
cua dung » cua dang, cua dong, qua dung
dung van » duong van, dung va, dang van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((((chieu sach) or (chieu sang))) or (chinh sach)) - hanh tranh cua dung dung van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sach) OR (chieu sang))) OR (chinh sach)) - hanh tranh cua dung dung van toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu sach) or (chieu sang))) or (chinh sach)) - hanh tranh cua dung dung van toan cao*.