Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tung » thanh tung, manh tung, hanh dung
hanh mang » nhanh mang, hanh trang, nhanh lang
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
cua dang » cua cong, cua ban
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((hanh tung) OR (hanh mang)) cua dang cong ((dan than) OR (manh toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((hanh tung) or (hanh mang)) cua dang cong ((dan than) or (manh toan)) cau*.