Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dong » anh dong, ha dong
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
anh dang » anh dong, anh dung, anh danh
anh bang » anh hoang, anh quang, tinh bang
cua dang » cua cong, cua ban
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 - ((hanh dong) or (((anh dang) OR (anh bang)))) cua dang cong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((hanh dong) OR (((anh dang) OR (anh bang)))) cua dang cong manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - ((hanh dong) or (((anh dang) OR (anh bang)))) cua dang cong manh toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((hanh dong) or (((anh dang) OR (anh bang)))) cua dang cong manh toan tap*.