Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh tung, thanh hung, hanh dung
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va thuong, va phuong, he thong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - ((thanh dung) OR (thanh duong)) va thong cong tac than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((thanh dung) OR (thanh duong)) va thong cong tac than cao*".