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