Perhaps you should try some spelling variations:
cuoc chinh » quoc thinh, cuoc chien
hanh trinh » canh tranh, hanh chinh
thong cong » tong cong, thong thong, phong chong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trinh cua » tinh cua, trinh luat, trinh quan
dan toan » van toan, dan than, manh toan
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: ((cuoc chinh) OR (hoc chinh)) sach - hanh trinh cua ((thong cong) or (trong cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cuoc chinh) OR (hoc chinh)) sach - hanh trinh cua ((thong cong) OR (trong cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cuoc chinh) OR (hoc chinh)) sach - hanh trinh cua ((thong cong) or (trong cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((cuoc chinh) OR (hoc chinh)) sach - hanh trinh cua ((thong cong) or (trong cong)) dan toan cao*.