Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh manh » hanh mang, lanh manh, hoang manh
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
va tinh » may tinh
manh va » hanh va, anh va, minh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((va tinh) or (chieu sang)) - hanh manh va nhung ((cong dan) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((va tinh) OR (chieu sang)) - hanh manh va nhung ((cong dan) OR (cong tan)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((va tinh) or (chieu sang)) - hanh manh va nhung ((cong dan) or (cong tan)) toan ban*.