Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
tung tan » cung tan, hung tan, tang tan
tung dan » dung dan, huong dan, trung dai
cong gai » cong hai, cong goi, cong lai
gai tren » gi tren, tai tren, loai tren
tren tau » tren thuc, tren may, tren dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (hieu manh)) - thanh ((tung tan) OR (tung dan)) dung cong gai tren tau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh ((tung tan) OR (tung dan)) dung cong gai tren tau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - thanh ((tung tan) OR (tung dan)) dung cong gai tren tau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - thanh ((tung tan) OR (tung dan)) dung cong gai tren tau*.