Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
anh tang » anh bang, anh dang, anh nang
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan 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 dung) OR (cua dang)) cong van ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - anh tang ((cua dung) OR (cua dang)) cong van ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - anh tang ((cua dung) OR (cua dang)) cong van ((than cap) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - anh tang ((cua dung) OR (cua dang)) cong van ((than cap) or (khan cap))*.