Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
thong manh » thong minh, thong mang, thong danh
hieu sang » chieu sang, hieu quang, nhieu tang
hieu lang » chieu sang, hieu quang, nhieu tang
trang va » tran van, hang va
va thong » va thuong, va phuong, he thong
manh van » anh van, menh van, canh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sang) or (hieu lang)) - canh trang va thong thong manh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (hieu lang)) - canh trang va thong thong manh van ban*.