Perhaps you should try some spelling variations:
thanh tung » thanh cong
hien xanh » hien hanh, hien nhanh, chieu xanh
nong cong » cong cong, tong cong, nang cong
cua nong » cua cong, cuu nong, cua dong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 - ((thanh trung) OR (thanh tung)) cua nong cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((thanh trung) OR (thanh tung)) cua nong cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh trung) OR (thanh tung)) cua nong cong dan than cau*.