Perhaps you should try some spelling variations:
thanh tung » thanh cong
thieu xanh » chieu xanh, hieu manh, thien danh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
thien anh » thien danh, tien anh, thien thanh
tung dap » tung dan, trung dai, tuong dan
toan tap » toan 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)) - thanh tung dap ung ((cong thanh) OR (dong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh tung dap ung ((cong thanh) OR (dong thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - thanh tung dap ung ((cong thanh) OR (dong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - thanh tung dap ung ((cong thanh) OR (dong thanh)) toan tap*.