Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
canh manh » lanh manh, canh tranh, cach mang
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than
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: hoc thien hach - canh manh va nhung cong ((van toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - canh manh va nhung cong ((van toan) OR (dan than)) tap*.