Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
hang hoac » hang hoa, hang khoa, nang hoc
ho chieu » hoc thieu, mot chieu, doi chieu
tac danh » sach danh, cac doanh, cac dan
danh bao » doanh bao, danh bat, dan bao

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

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