Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh tranh cua thong thong ((tap toan) OR (tap quan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh tranh cua thong thong ((tap toan) OR (tap quan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh tranh cua thong thong ((tap toan) OR (tap quan)) cau*.