Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cong vang » cong lang, cong quang, cong ngang
hoc hieu » hoc thieu, hoc hien, doc hieu
trang va » tran van, hang va
song van » hoang van, trong van, duong van
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - canh trang va thuong ((cong vang) or (song van)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - canh trang va thuong ((cong vang) OR (song van)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - canh trang va thuong ((cong vang) or (song van)) toan tap*.