Perhaps you should try some spelling variations:
chieu lang » chieu sang, chi lang, chieu xanh
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, suat thong
van tuyen » va tuyen, van chuyen, van nguyen
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu lang) or (hieu lang)) - hanh tranh ((cua thong) OR (cua tong)) cong van tuyen tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu lang) OR (hieu lang)) - hanh tranh ((cua thong) OR (cua tong)) cong van tuyen tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu lang) or (hieu lang)) - hanh tranh ((cua thong) OR (cua tong)) cong van tuyen tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu lang) or (hieu lang)) - hanh tranh ((cua thong) OR (cua tong)) cong van tuyen tap*.