Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
khan ap » khan cap, han ap, khan dam

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 dan) or (cong thanh)) ((than cau) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh tung cua thong ((cong dan) OR (cong thanh)) ((than cau) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh tung cua thong ((cong dan) or (cong thanh)) ((than cau) or (khan ap))*.