Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
anh tang » anh bang, anh dang, anh nang
cua dang » cua cong, cua ban
cua dong » chua dong, cua cong, cua nong
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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 - anh tang ((cua dang) or (cua dong)) cong van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - anh tang ((cua dang) OR (cua dong)) cong van than cap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - anh tang ((cua dang) or (cua dong)) cong van than cap*.