Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh mang » nhanh mang, hanh trang, nhanh lang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
xa nang » va nang, xa nong, ca nang
da nang » cam nang, kha nang, cao nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((thuc hanh) or (chieu sang)) - hanh mang ((xa nang) OR (da nang)) cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thuc hanh) OR (chieu sang)) - hanh mang ((xa nang) OR (da nang)) cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thuc hanh) or (chieu sang)) - hanh mang ((xa nang) OR (da nang)) cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((thuc hanh) or (chieu sang)) - hanh mang ((xa nang) OR (da nang)) cong dan toan ban*.