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
tung cua » trung cua, tuong cua, dung cua
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
chan cau » phan cau, can cau, chinh cau
chinh ca » chinh ta, chinh va, chinh tai

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