Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va phuong, he thong, va thanh
toan ban » van ban
va cong » tai cong, cua cong

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 - thanh trung ((((va thong) or (va cong))) or (va thuong)) cong hach toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh trung ((((va thong) OR (va cong))) OR (va thuong)) cong hach toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh trung ((((va thong) or (va cong))) or (va thuong)) cong hach toan ban*.