Perhaps you should try some spelling variations:
phuong quang » phung quang, phuong hoang, luong quang
thuong quang » thong quang, truong quang, tuong quang
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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: doc ((hieu xanh) OR (chieu xanh)) - anh ((thuong quang) or (phuong quang)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - anh ((thuong quang) OR (phuong quang)) dung cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - anh ((thuong quang) or (phuong quang)) dung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - anh ((thuong quang) or (phuong quang)) dung cong dan toan cao*.