Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thang long » thanh cong
tranh cua » doanh cua, manh cua
hang cong » dang cong, bang cong, thanh cong
hang nong » han tong
toan phan » thanh phan, toan ban, hoa phan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh cua ((hang cong) OR (((hang nong) OR (thang long)))) toan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - canh tranh cua ((hang cong) or (((hang nong) OR (thang long)))) toan phan tu~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh cua ((hang cong) or (((hang nong) OR (thang long)))) toan phan tu*.