Perhaps you should try some spelling variations:
thuoc phap » thuoc phai, thuc pham, hoc phap
phap trinh » phap tinh, lap trinh, phap sinh
trinh vat » trinh van, trinh luat, sinh vat
lam thuoc » nam thuoc, am thuc, cay thuoc
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
va lam » van lam, va lap
cua te » cua tu

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 ((nang ma) or (nang x)) hoi. hieu va lam thuoc phap trinh vat ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (nang x)) hoi. hieu va lam thuoc phap trinh vat ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (nang x)) hoi. hieu va lam thuoc phap trinh vat ((cua tre) or (cua te))*.