Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
nhanh lang » nhanh quang, nhanh thang, nhan dang
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
thien anh » thien danh, tien anh, thien thanh
hanh tang » hanh trang, anh tang, hanh mang
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan ban » van ban

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 (thien anh)) - ((hanh tang) or (nhanh lang)) luan thong cong tam toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - ((hanh tang) OR (nhanh lang)) luan thong cong tam toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - ((hanh tang) or (nhanh lang)) luan thong cong tam toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - ((hanh tang) or (nhanh lang)) luan thong cong tam toan ban*.