Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
hanh trang » thanh trung, canh tranh, hanh trinh
hien sang » hien trang, chieu sang, thien bang
cua khong » hua khong, cua phuong, cua thuong
duong dan » duong dang, huong dan, duong van
dan toan » van toan, dan than, manh toan
toan ban » van ban

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 sang) or (khien bang)) - hanh trang ((suat thong) or (cua khong)) duong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (khien bang)) - hanh trang ((suat thong) OR (cua khong)) duong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) or (khien bang)) - hanh trang ((suat thong) or (cua khong)) duong dan toan ban*.