Perhaps you should try some spelling variations:
hanh hang » thanh hang, hang hang, hanh han
dang cong » dung cong
cong phap » chong phap, cong phan, cong pham
phap phan » phap phat, phap hoan, phap luan
doc hieu » hoc thieu, hoc hien
hang lua » hang luan, hang cua, hang la
lua dang » cua dang, lua sang, luan nang
phan dau » phan tu, hang dau

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) or (toc thieu)) sang - hanh hang lua dang cong phap phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - hanh hang lua dang cong phap phan dau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - hanh hang lua dang cong phap phan dau*.