Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
phong cong » phong chong, thong cong, chong cong
chu xanh » chu manh, chieu xanh, chua xang
anh tang » anh bang, anh dang, anh nang
tang cuu » tang cua, tang cuoc, thang cua
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
chuc » thuc, chua, phuc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chuc nang)) - anh tang cuu ((phuong cong) OR (phong cong)) tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chuc nang)) - anh tang cuu ((phuong cong) OR (phong cong)) tac toan ban~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chuc nang)) - anh tang cuu ((phuong cong) OR (phong cong)) tac toan ban*.