Perhaps you should try some spelling variations:
thien chinh » tien thinh, thien chien, thien thanh
thi chinh » tai chinh, thi hinh, thi hanh
nang cong » nang song, dang cong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
tranh va » tranh van, trang va, trinh va
va nang » van nang, da nang, cam nang

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

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