Perhaps you should try some spelling variations:
thien anh » thien danh, thien thanh, thien chanh
hanh tang » hanh trang, anh tang, hanh mang
bang cong » dang cong, bang song, hang cong
thanh lap » thanh san, phan lap, thanh hai
tien anh » tieng anh, tien manh, dien anh
tang cua » mang cua, hang cua, tang luan
cua bang » chua bang, cua ban, cua dang
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap

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 ((thien anh) OR (tien anh)) - hanh tang cua bang cong dan ((thanh lap) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) OR (tien anh)) - hanh tang cua bang cong dan ((thanh lap) or (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) OR (tien anh)) - hanh tang cua bang cong dan ((thanh lap) or (toan cau))*.