Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
hien hanh » dieu hanh
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien hanh) or (chieu sach)) - hanh trang ((cua thong) OR (cua khong)) huong dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (chieu sach)) - hanh trang ((cua thong) OR (cua khong)) huong dan than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (chieu sach)) - hanh trang ((cua thong) OR (cua khong)) huong dan than man".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (chieu sach)) - hanh trang ((cua thong) OR (cua khong)) huong dan than man*.