Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh luan » trinh luan, trinh luat, doanh luan
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
chau tinh » cuu tinh, ha tinh, cua tinh
hoa cau » hoa cac, hoa dau, hoa chat
hoa mau » hoa may, hoa dau, hoa muu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chau tinh)) - hanh tranh luan nhung cong thanh ((hoa cau) OR (hoa mau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chau tinh)) - hanh tranh luan nhung cong thanh ((hoa cau) OR (hoa mau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chau tinh)) - hanh tranh luan nhung cong thanh ((hoa cau) OR (hoa mau))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chau tinh)) - hanh tranh luan nhung cong thanh ((hoa cau) OR (hoa mau))*.