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, trong dam, trung nam
trung dai » truong dai, truong dao, trung tam
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung dam) OR (trung dai)) luong cong tac hanh luat~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung dam) or (trung dai)) luong cong tac hanh luat*.