Perhaps you should try some spelling variations:
vien nganh » vien thanh
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tang » hanh trang, anh tang, hanh mang
tang chua » tang cua, tranh chua, tang ha
chua dong » cua dong, ha dong, huy dong
trong san » trong cac, dong san, trong ca
cong san » cong tac
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 (vien nganh)) - hanh tang chua dong ((trong san) OR (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (vien nganh)) - hanh tang chua dong ((trong san) OR (cong san)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (vien nganh)) - hanh tang chua dong ((trong san) OR (cong san)) toan ban*".