Perhaps you should try some spelling variations:
thieu manh » tien manh, trieu minh, chieu xanh
thanh tung » thanh cong
cua truong » cua trung, xuan truong, xa truong
hieu manh » chieu xanh, hieu nganh, dieu hanh
dan thanh » dang thanh, danh thanh, ban thanh
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong san, cong tan, huong dan

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