Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cho chinh » chon chinh, che chinh, cuoc chinh
tranh cua » doanh cua, manh cua
cua trong » cua truong, cua trung, qua trong
ho chinh » hoc chinh, hoa chinh, do chinh
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chinh) or (cho chinh)) sach - hanh tranh cua trong cong ((tan toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (cho chinh)) sach - hanh tranh cua trong cong ((tan toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) or (cho chinh)) sach - hanh tranh cua trong cong ((tan toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) or (cho chinh)) sach - hanh tranh cua trong cong ((tan toan) OR (tap toan)) cau*.