Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
luat thong » suat thong, xuat thong, luat trong
duong manh » duong van
chau tinh » cuu tinh, ha tinh, cua tinh
manh toan » thanh toan, anh tuan, tinh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chieu sach) or (chau tinh)) - hanh trinh ((luat thong) OR (luat thuong)) duong manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chieu sach) OR (chau tinh)) - hanh trinh ((luat thong) OR (luat thuong)) duong manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((chieu sach) or (chau tinh)) - hanh trinh ((luat thong) OR (luat thuong)) duong manh toan tap".
• Adding a wildcard symbol may retrieve word variants: chao ((chieu sach) or (chau tinh)) - hanh trinh ((luat thong) OR (luat thuong)) duong manh toan tap*.