Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
cua chung » cua nhung, luan chung, luat chung
cuong dan » cuong danh, huong dan, cong dan
cua hung » cua nhung, cua huong, cua hang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((trieu tinh) or (chieu sach)) - hanh tang ((cua hung) OR (cua chung)) cuong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((trieu tinh) OR (chieu sach)) - hanh tang ((cua hung) OR (cua chung)) cuong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((trieu tinh) or (chieu sach)) - hanh tang ((cua hung) OR (cua chung)) cuong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((trieu tinh) or (chieu sach)) - hanh tang ((cua hung) OR (cua chung)) cuong dan toan cau*.