Perhaps you should try some spelling variations:
thanh tranh » thanh thanh, thanh tran, thanh trang
tranh chap » tranh cua, trinh chat
thong cong » tong cong, thong thong, phong chong
doi chinh » do chinh, tai chinh, hoc chinh
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

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