Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
song hoang » song hong, song hang, thong hoang
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hoang van » hang va
tran van » luan van
van song » van dong, van cong, van son
van van » tan van, san van, van vat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien hanh)) - thanh tran van song hoang van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh tran van song hoang van van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh tran van song hoang van van ban*.