Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh lam » thanh lap, hanh lam, thanh nam
tang mai » tang ma, tang tai, lang mai
cham duc » pham duc, pham duy, phan duc
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet

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 mai hoi. hieu va ((cham duc) or (cham soc)) van thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang mai hoi. hieu va ((cham duc) OR (cham soc)) van thanh lam cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty tang mai hoi. hieu va ((cham duc) or (cham soc)) van thanh lam cua tre*.