Perhaps you should try some spelling variations:
pham duy » pham duc
tinh lam » trinh lam, dinh lam, tinh lao
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
hieu vu » hieu va, hieu ve, hieu su
vu pham » su pham, vi pham, vu kham
va tinh » may tinh
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet
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: tu sach ty tang ((xa hoi) or (ma hoa)). hieu vu pham duy va tinh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang ((xa hoi) OR (ma hoa)). hieu vu pham duy va tinh lam cua tre*.