Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
luong cong » dung cong, trong cong, cong cong
doi chieu » doc hieu, doi chi, mot chieu
trung dam » trung tam, trung dai, trong dam
hanh luat » nganh luat, hang luan, hanh lam
cong tac » cong ty
tac hanh » tac thanh, tac danh, sac hanh

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh ((trung dam) OR (truong dai)) luong cong tac hanh luat~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung dam) OR (truong dai)) luong cong tac hanh luat*.