Perhaps you should try some spelling variations:
phuong doanh » phuong danh, phuong doan, phuong hoang
quan nhung » qua nhung, cua nhung, luan chung
luan nhung » luan chung, luan hung, luan phuong
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
hoan cao » hoang cao, toan cao, hoan hao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (chinh sach)) - hanh tang ((luan nhung) OR (quan nhung)) phuong doanh hoan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (chinh sach)) - hanh tang ((luan nhung) OR (quan nhung)) phuong doanh hoan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) or (chinh sach)) - hanh tang ((luan nhung) OR (quan nhung)) phuong doanh hoan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (chinh sach)) - hanh tang ((luan nhung) OR (quan nhung)) phuong doanh hoan cao*.