Perhaps you should try some spelling variations:
phap trinh » phap tinh, lap trinh, phap sinh
thuoc phap » thuoc phai, thuc pham, hoc phap
cay thuoc » cua thuoc, nam thuoc, va thuoc
trinh va » trinh van, trinh vat, trinh ve
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
van cay » van cau, van bay, van ca
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nang xa » nang ma, mang xa, ang xa
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu

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 ((((nang xa) or (lang xa))) or (nang x)) hoi. hieu van cay thuoc phap trinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((((nang xa) OR (lang xa))) OR (nang x)) hoi. hieu van cay thuoc phap trinh va cuu tre*.