Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong san » cong tac
san van » tan van, luan van, tran van

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: "ho ((((hieu manh) OR (hieu nganh))) OR (chieu sach)) - hanh tranh cua thong cong san van ban~".
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu manh) OR (hieu nganh))) OR (chieu sach)) - hanh tranh cua thong cong san van ban*.