Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thanh dung » thanh duong, thanh tung, thanh hung
thong cong » trong cong, tong cong, thong thong
phap quang » pham quang, phap quan, phan quang
cong phap » chong phap, cong phan, cong pham
quang cao » nang cao, quang nam
ha thong » hoa thong, nha thong, he thong
dung ha » dung va, dung he, dung khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - thanh dung ha thong cong phap quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - thanh dung ha thong cong phap quang cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - thanh dung ha thong cong phap quang cao*.