Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dong bang » dong san
bang cong » dang cong, bang song, hang cong
manh toan » thanh toan, anh tuan, tinh toan
hoi hieu » hoi phieu, hoi tieu, moi hieu
hanh dam » thanh dam, hanh lam, hanh nam
dam dong » dao dong, dan dong, lam dong
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh dam dong bang cong ((manh toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh dam dong bang cong ((manh toan) OR (dan than)) tap.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh dam dong bang cong ((manh toan) or (dan than)) tap*.