Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
sach thu » sach thue, sach thieu, sach tham
thu tang » thu trang, thu thang, thu hang
pham duy » pham duc
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
hieu vu » hieu va, hieu ve, hieu su
vu pham » su pham, vi pham, vu kham
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, ma hoa, me hoi
duy va » duy vat, duy van, day va

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 thu tang ((ma hoi) or (xa hoi)). hieu vu pham duy va thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu tang ((ma hoi) OR (xa hoi)). hieu vu pham duy va thanh lap cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach thu tang ((ma hoi) or (xa hoi)). hieu vu pham duy va thanh lap cua tre*.