Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thieu, sach tham, cach thuc
ve chat » va chat, van chat
vai cua » dai cua, hai cua, lai cua
ma hanh » va hanh, da hanh, na hanh
chat co » thuat co, chat cua, chat deo
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
cao hoi » co hoi, cao hoc, tao hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach thu) or (sach thue)) nang ((cao hoi) OR (cau hoi)). hieu ve chat co ma hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thu) OR (sach thue)) nang ((cao hoi) OR (cau hoi)). hieu ve chat co ma hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach thu) or (sach thue)) nang ((cao hoi) OR (cau hoi)). hieu ve chat co ma hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach thu) or (sach thue)) nang ((cao hoi) OR (cau hoi)). hieu ve chat co ma hanh vai cua tre*.