Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong sang » cong lang, cong vang, cong bang
tung cua » trung cua, tuong cua, dung cua
cong san » cong tac
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 - thanh tung cua thong ((cong san) or (cong sang)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung cua thong ((cong san) OR (cong sang)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung cua thong ((cong san) or (cong sang)) than cau*.