Perhaps you should try some spelling variations:
sach thu » sach thue, sach tham, cach thuc
hanh lai » hanh lam, hanh tai, thanh lap
cham duc » cham soc, pham duy, phan duc
lai cuu » lai cua, lai chau, lai cuoc
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
cuu tre » cua tre, cau tren, cau treo
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 hanh lai cuu 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 hanh lai cuu 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 hanh lai cuu tre*.