Perhaps you should try some spelling variations:
sach thu » sach thue, sach tham, cach thuc
danh lai » danh sai, gianh lai, dinh lam
cham duc » cham soc, pham duy, phan duc
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach thu) or (sach thieu)) sang ma hoi. hieu ve ((cham duc) or (pham duc)) va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thieu)) sang ma hoi. hieu ve ((cham duc) OR (pham duc)) va danh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thieu)) sang ma hoi. hieu ve ((cham duc) or (pham duc)) va danh lai cua tre*.