Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) or (chieu sach))) or (chieu tinh)) - hanh tranh cua nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chieu sach))) OR (chieu tinh)) - hanh tranh cua nhung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) or (chieu sach))) or (chieu tinh)) - hanh tranh cua nhung cong dan van ban*.