Perhaps you should try some spelling variations:
sach loai » sach bai, cac loai, sach hoi
hanh vai » hanh vi, hanh va, hanh tai
sach doi » sach hoi, sach moi, sach dao
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
ve cao » va cao, ve bao, ve co
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach loai) OR (sach doi)) nang x hoi. hieu ((ve cao) or (ve cac)) duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach loai) OR (sach doi)) nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach loai) OR (sach doi)) nang x hoi. hieu ((ve cao) or (ve cac)) duc va hanh vai cua tre*".