Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
khong cong » thong cong, khong cang, chong cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trang cua » tranh cua, tang cua, trung cua
cua khong » hua khong, cua phuong, cua thuong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ma » than man, than va, khan ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (chieu sach)) - hanh trang cua khong cong dan than ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu sach)) - hanh trang cua khong cong dan than ma.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu sach)) - hanh trang cua khong cong dan than ma*.