Perhaps you should try some spelling variations:
phap sinh » phau sinh, phai sinh, phap tinh
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
hoc phap » hoc phan, hoc phat, hoc pho
sinh bat » sinh vat, sinh ban, sinh hoat
sach ky » sac ky, sach y, sach ty
lang ha » long ha
van lam » van nam
lam hoc » am hoc, lam hoa, tam hoc
bat cua » ban cua, mat cua, bai cua
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: thu sach ky ((lang ha) or (nang x)) hoi. hieu van lam hoc phap sinh bat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((lang ha) OR (nang x)) hoi. hieu van lam hoc phap sinh bat cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((lang ha) or (nang x)) hoi. hieu van lam hoc phap sinh bat cua tre*.