Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu danh » thien danh, tieu danh, dieu danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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