Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
toan tuan » tran tuan, doan tuan, toan luan
toan quan » tran quang, doan quang, van quan
bang nong » hang nong, bang song, bang cong
ho chieu » hoc thieu, doi chieu, mot chieu
nong tac » cong tac, dong tac, nong tan
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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 - thanh ((toan tuan) OR (toan quan)) bang nong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - thanh ((toan tuan) OR (toan quan)) bang nong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) sach - thanh ((toan tuan) OR (toan quan)) bang nong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) sach - thanh ((toan tuan) OR (toan quan)) bang nong tac toan ban*.