Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
thanh tung » thanh cong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
luong toan » luong thanh, truong toan, luong tai
hieu manh » chieu xanh, hieu nganh, dieu hanh
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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 va ((nhung cong) or (thong cong)) luong toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - thanh tung va ((nhung cong) OR (thong cong)) luong toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh tung va ((nhung cong) or (thong cong)) luong toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh tung va ((nhung cong) or (thong cong)) luong toan cao*.