Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
va thanh » gia thanh, ban thanh, va tinh
pham duy » pham duc
hieu vu » hieu va, hieu ve, hieu su
lam cua » nam cua, lam chat
vu pham » su pham, vi pham, vu kham
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
duy va » duy vat, duy van, day va
ma hoi » mai hoi, me hoi, va hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty tang ((((ma hoi) OR (xa hoi))) or (ma hoa)). hieu vu pham duy va thanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang ((((ma hoi) OR (xa hoi))) OR (ma hoa)). hieu vu pham duy va thanh lam cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty tang ((((ma hoi) OR (xa hoi))) or (ma hoa)). hieu vu pham duy va thanh lam cua tre*".