Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tang qua » tang quan, tang cua, tang quang
tang quy » tan quy, nang quy, tang quan
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 - anh ((tang qua) OR (tang quy)) tong cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - anh ((tang qua) OR (tang quy)) tong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - anh ((tang qua) OR (tang quy)) tong cong san toan ban*.