Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu manh)) - lanh tranh cua thong cong dan than ban~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu manh)) - lanh tranh cua thong cong dan than ban*.