Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
cua thong » cua thuong, cua khong, cua tong
cong bang » cuong bang, dong bang, hong bang
tung cua » trung cua, tuong cua, dung cua
cong ban » cong san, cong tan, cong dan
than cau » toan cau, phan cau, than cap

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