Perhaps you should try some spelling variations:
phap trinh » phap tinh, lap trinh, phap sinh
trinh vat » trinh van, trinh luat, sinh vat
te sach » toc sach
lam hoc » am hoc, lam hoa, lam thuoc
vat cua » mat cua, bat cua, dat cua
tam hoc » tam hon, am hoc, tam ho
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang ha » long ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((lang ha) or (nang x)) hoi. hieu va ((lam hoc) or (tam hoc)) phap trinh vat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang ha) OR (nang x)) hoi. hieu va ((lam hoc) OR (tam hoc)) phap trinh vat cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang ha) or (nang x)) hoi. hieu va ((lam hoc) or (tam hoc)) phap trinh vat cua tre*.