Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
dung cong » dung trong
dan toan » van toan, dan than, manh toan
toan ban » van ban
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - canh manh va ((hang cong) or (dung cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - canh manh va ((hang cong) OR (dung cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - canh manh va ((hang cong) or (dung cong)) dan toan ban*.