Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
cham duc » pham duc, pham duy, phan duc
hanh lam » hanh kem, hanh va, dinh lam
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
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 ((cham 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 ((cham duc) OR (cham soc)) va ((hanh lam) OR (thanh lap)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty tang ma hoi. hieu vu ((cham 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 ((cham duc) OR (cham soc)) va ((hanh lam) or (thanh lap)) cua tre*.