Perhaps you should try some spelling variations:
thanh tung » thanh cong
thien anh » thien danh, tien anh, thien thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
tung tan » tung dan, cung tan, hung tan
tan dung » tran dung, tin dung, van dung
cong tai » cong thai, cong tac, dong tai
tai tren » thai tren, thi tren, gai tren
tren dat » tren dia, tren may

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 anh) or (hieu manh)) - thanh tung tan dung cong tai tren dat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (hieu manh)) - thanh tung tan dung cong tai tren dat.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (hieu manh)) - thanh tung tan dung cong tai tren dat*.