Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
canh manh » lanh manh, canh tranh, cach mang
cua trung » cua truong, xuan trung, cua nhung
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
dan toan » van toan, dan than, xuan 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 chieu) or (hoc hien)) sach - canh manh cua trung cong ((dan toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc hien)) sach - canh manh cua trung cong ((dan toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc hien)) sach - canh manh cua trung cong ((dan toan) OR (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) sach - canh manh cua trung cong ((dan toan) OR (manh toan)) cau*.