Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
danh vai » danh sai, danh va, doanh van
sach lo » sach dao, sach hoi, sach moi
lang xa » lang ha, dang xay, lang van
cau duc » cao duc, cau luc, chu duc
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach doi)) lang xa hoi. ((lien quan) OR (hieu qua)) cau duc va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) OR (sach doi)) lang xa hoi. ((lien quan) or (hieu qua)) cau duc va danh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach lo) OR (sach doi)) lang xa hoi. ((lien quan) or (hieu qua)) cau duc va danh vai cua tre*.