Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trang » thanh trung, canh tranh, hanh trinh
trang cua » tranh cua, tang cua, trung cua
cua bang » chua bang, cua ban, cua dang
cong dan » cong san, cong tan, huong dan
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 ((chieu sang) or (thieu khang)) - hanh trang cua bang ((cong dan) or (cuong linh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (thieu khang)) - hanh trang cua bang ((cong dan) OR (cuong linh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (thieu khang)) - hanh trang cua bang ((cong dan) or (cuong linh)) toan ban*.