Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
hang ban » hang luan, hang va, hang tai
cua hang » cua dang, cua nhung, cua cong
cong dan » cong san, cong tan, cong dong
than ban » thanh ban, toan ban, than man
ban cua » ban quan

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

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