Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » dong thanh, cong trinh, truong thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua nhung » va nhung
hang ban » hang luan, hang va, hang tai
cong tan » cong tac, cong san, cong ty
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 (chieu sang)) - hang ban cua nhung ((cong tan) OR (cong thanh)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - hang ban cua nhung ((cong tan) OR (cong thanh)) than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sang)) - hang ban cua nhung ((cong tan) OR (cong thanh)) than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - hang ban cua nhung ((cong tan) OR (cong thanh)) than ban*.