Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
cong quang » luong quang, thong quang, duong quang
quang chat » quang chan, quang phat, quang cao
tong cong » trong cong, cong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
va tong » va thong, va tuong, va trong
chat tu » nhat tu, chai tu, chay tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu tinh) or (chieu sang)) - canh trinh va tong cong quang chat tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (chieu sang)) - canh trinh va tong cong quang chat tu.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) or (chieu sang)) - canh trinh va tong cong quang chat tu*.