Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - canh tranh va nhung cong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (((chieu xanh) OR (chieu sach)))) - canh tranh va nhung cong dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - canh tranh va nhung cong dan phan cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (((chieu xanh) OR (chieu sach)))) - canh tranh va nhung cong dan phan cau*.