Perhaps you should try some spelling variations:
nhung dung » phuong dung, ung dung, thong dung
hieu manh » chieu xanh, hieu nganh, hien hanh
doanh cua » doanh luan
anh quang » anh xquang, anh quan, nhanh quang
quang cao » nang cao, quang nam
manh cua » ban cua
dung anh » dung danh, duong anh, dong anh

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

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