Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
nhan dang » nhan dan, phan dang, tran dang
dang nong » dang cong, hang nong, dang hoang
tang nong » hang nong, tang dong, tang mong
theo chu » cho chu, chao chu, theo yeu
dang cua » dung cua, dong cua, mang cua
san than » sang than, san thanh, ban than
than man » than ma, thanh san, tran manh

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 (theo chu)) sach - nhan dang cua ((dang nong) or (tang nong)) san than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) sach - nhan dang cua ((dang nong) OR (tang nong)) san than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sach - nhan dang cua ((dang nong) or (tang nong)) san than man".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - nhan dang cua ((dang nong) or (tang nong)) san than man*.