Perhaps you should try some spelling variations:
phap trinh » phap tinh, lap trinh, phap sinh
trinh dat » trinh da, trinh dan, trinh dao
hoc phap » hoc phan, hoc phat, hoc pho
hieu van » hieu va, thien van, lieu va
dat cua » dai cua, day cua, mat cua
tam hoc » tam hon, am hoc, tam ho
van tam » van tham, van tai, van tan
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach thu, xach tay
lang ha » long ha
sach tu » sach thu, cach tu, sach uu

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 ty) or (sach tu)) ((lang ha) or (nang x)) hoi. hieu van tam hoc phap trinh dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach tu)) ((lang ha) OR (nang x)) hoi. hieu van tam hoc phap trinh dat cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach tu)) ((lang ha) or (nang x)) hoi. hieu van tam hoc phap trinh dat cua tre*.