Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
canh tinh » hanh tinh, manh tinh, canh tranh
dong cong » duong cong, dung cong, dang cong
theo cau » theo chu, theo cap, theo dau
cau sach » cao sach, hau sach, rau sach
cua dong » chua dong, cua cong, cua dang
cong san » cong tac
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo cau sach - ((canh tinh) or (nhanh tinh)) cua dong cong san ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo cau sach - ((canh tinh) OR (nhanh tinh)) cua dong cong san ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo cau sach - ((canh tinh) or (nhanh tinh)) cua dong cong san ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo cau sach - ((canh tinh) or (nhanh tinh)) cua dong cong san ((toan cao) OR (toan ban))*.