Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
trung cao » truong cao, trung cap, trung co
cuong bai » uong bi, cuong ma
cao dung » cao dang, cao dong, cao ung
cong bai » cong hai, cung bai, cong ba
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 xanh) OR (chieu xanh)) - thanh trung cao dung ((cong bai) or (cuong bai)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh trung cao dung ((cong bai) OR (cuong bai)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - thanh trung cao dung ((cong bai) or (cuong bai)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - thanh trung cao dung ((cong bai) or (cuong bai)) toan cao*.