Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thong cong » trong cong, tong cong, thong thong
dang chinh » hang chinh, dang hinh, dung chinh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
chinh cau » chinh chau, chinh ca, chinh can
ho chieu » hoc thieu, doi chieu, mot chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (theo chieu)) sach - canh tranh cua ((hang cong) or (thong cong)) dang chinh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - canh tranh cua ((hang cong) OR (thong cong)) dang chinh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - canh tranh cua ((hang cong) or (thong cong)) dang chinh cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - canh tranh cua ((hang cong) or (thong cong)) dang chinh cau*.