Perhaps you should try some spelling variations:
quang nhanh » quang thanh, quang khanh, quang ninh
doanh doanh » toan doanh, doanh hoan, doanh thanh
canh doanh » hanh doanh, chinh doanh, kinh doanh
nhung cong » dung cong, thong cong, hang cong
quang hanh » quang thanh, quang khanh, quan hanh
dieu danh » dieu hanh, tieu danh, dia danh
hoc dieu » hoc thieu, hoc hien

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

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