Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
hang cong » dang cong, hang nong, bang cong
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
than cao » toan cao, thai cao, than cap
he hang » he zhang, le hang, te hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu xanh) OR (chieu sang)) - ((canh trinh) or (hanh trinh)) he hang cong lang than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu xanh) OR (chieu sang)) - ((canh trinh) OR (hanh trinh)) he hang cong lang than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((chieu xanh) OR (chieu sang)) - ((canh trinh) or (hanh trinh)) he hang cong lang than cao".
• Adding a wildcard symbol may retrieve word variants: toc ((chieu xanh) OR (chieu sang)) - ((canh trinh) or (hanh trinh)) he hang cong lang than cao*.