Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
chu quang » chat quang, vu quang
trinh qua » trinh quan, trinh cua, trinh quang
dung cong » dung trong
qua dung » quang dung, su dung, qua song
cong san » cong tac
san than » sang than, san thanh, ban than
than cap » khan cap, thanh lap, thanh cac
chuc » thuc, chua, phuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((chu quang) or (chuc nang))) or (chieu sang)) - canh trinh qua dung cong san than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chu quang) OR (chuc nang))) OR (chieu sang)) - canh trinh qua dung cong san than cap.
• Adding a wildcard symbol may retrieve word variants: theo ((((chu quang) or (chuc nang))) or (chieu sang)) - canh trinh qua dung cong san than cap*.