Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
thanh lap » phan lap, thanh hai, thanh van
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

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