Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
thanh tung » thanh cong
hoc thien » hoc hien, hoc thieu, hoc thiet
nang cong » nang song, dang cong, bang cong
tung van » trung van, tang van, dung van
van nang » van quang, van ban, van dong
dan toan » van toan, manh toan, xuan toan
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: hoc thien danh - thanh tung van nang cong ((dan toan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien danh - thanh tung van nang cong ((dan toan) OR (dan than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thien danh - thanh tung van nang cong ((dan toan) or (dan than)) ban*.