Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu quang » thieu quang, hieu quan, hieu qua
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, nhieu tang, hieu van
vat thong » va thong, vat trong, mat thong
anh dung » anh dong, anh huong, sach dung
dung vat » dung va, dong vat, dung dat
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 (((hieu lang) OR (hieu quang)))) - anh dung vat thong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (((hieu lang) OR (hieu quang)))) - anh dung vat thong cong tan toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (((hieu lang) OR (hieu quang)))) - anh dung vat thong cong tan toan cao*".