Perhaps you should try some spelling variations:
thuoc lap » thuoc la, thuoc luan, thuoc phap
lam thuoc » nam thuoc, am thuc, cay thuoc
trinh va » trinh van, trinh vat, trinh ve
sach ky » sac ky, sach y, sach kem
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
va lam » van lam, va lap
va cua » va chua, via cua, ca cua

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 ky) OR (sach ty)) ((nang xa) or (nang x)) hoi. lieu va lam thuoc lap trinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) ((nang xa) OR (nang x)) hoi. lieu va lam thuoc lap trinh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) ((nang xa) or (nang x)) hoi. lieu va lam thuoc lap trinh va cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) ((nang xa) or (nang x)) hoi. lieu va lam thuoc lap trinh va cua tre*.