Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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 ((hieu manh) OR (((chieu xanh) OR (chieu sach)))) - hanh trang cua nhung cong van than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - hanh trang cua nhung cong van than cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - hanh trang cua nhung cong van than cau*.