Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hanh lam » hanh kem, hanh va, dinh lam
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
hieu vu » hieu va, hieu ve, hieu su
tang ma » mang may, tang van
ty tang » tay tang, ty xang, ty hang
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: so sach ty tang ma hoi. hieu vu ((pham duc) or (cham soc)) va ((hanh lam) or (thanh lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty tang ma hoi. hieu vu ((pham duc) OR (cham soc)) va ((hanh lam) OR (thanh lap)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty tang ma hoi. hieu vu ((pham duc) or (cham soc)) va ((hanh lam) or (thanh lap)) cua tre*.