Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
thanh tran » thanh trang, thanh toan, thanh tra
hoc thien » hoc hien, hoc thieu, hoc thiet
hang cong » dang cong, hang nong, bang cong
tran van » luan van
van hang » van khang, van hoang, van thang
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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 tran van hang cong ((dan than) or (van toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien danh - thanh tran van hang cong ((dan than) OR (van toan)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc thien danh - thanh tran van hang cong ((dan than) or (van toan)) tap*.