Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, dang xay, mang cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu ((((mang xa) or (mang may))) or (nang x)) hoi. hieu van cau duc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((((mang xa) OR (mang may))) OR (nang x)) hoi. hieu van cau duc va hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((((mang xa) or (mang may))) or (nang x)) hoi. hieu van cau duc va hanh vai cua tre*.