Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
trung van » truong van, trung va, trung tuan
trong van » trong cac
trong san » trong cac, cong san, dong san
ho chieu » theo chieu, doi chieu, mot chieu
san toan » van toan, dan toan, manh 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 (hoc thieu)) sach - thanh ((trung van) or (trong van)) dung trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - thanh ((trung van) OR (trong van)) dung trong san toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - thanh ((trung van) or (trong van)) dung trong san toan ban*".