Perhaps you should try some spelling variations:
nhung doanh » nhung danh, dung doanh, nhung don
hang doanh » hanh doanh, van doanh, dung doanh
hieu manh » chieu xanh, hieu nganh, hien hanh
cua tuong » cua truong, cua thuong, cua huong
duong anh » duong manh, duong xanh, duong vanh
tuan cu » tuan tu, quan cua, tuan thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (dieu hanh)) - ((hang doanh) or (nhung doanh)) cua tuong duong anh tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - ((hang doanh) OR (nhung doanh)) cua tuong duong anh tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - ((hang doanh) or (nhung doanh)) cua tuong duong anh tuan cu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - ((hang doanh) or (nhung doanh)) cua tuong duong anh tuan cu*.