Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
dong trong » duong trong, dung trong, cong trong
hieu xanh » chieu xanh, hieu manh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
trong san » trong cac, cong san, dong san
tang huy » trang huy, tang quy, tang huyet
huy dong » ha dong
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) OR (hieu nganh))) or (vien nganh)) - hanh tang huy dong trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((((hieu xanh) OR (hieu nganh))) OR (vien nganh)) - hanh tang huy dong trong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((((hieu xanh) OR (hieu nganh))) or (vien nganh)) - hanh tang huy dong trong san toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((((hieu xanh) OR (hieu nganh))) or (vien nganh)) - hanh tang huy dong trong san toan ban*.