Perhaps you should try some spelling variations:
thuoc lap » thuoc la, thuoc luan, thuoc phap
lam thuoc » nam thuoc, am thuc, cay thuoc
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
trinh va » trinh van, trinh vat, trinh ve
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang ma, mang xa, ang xa
lang xa » lang ha, dang xay, lang van
van lam » van nam
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 ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu van lam thuoc lap trinh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((nang xa) OR (lang xa))) OR (nang x)) hoi. hieu van lam thuoc lap trinh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu van lam thuoc lap trinh va cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu van lam thuoc lap trinh va cua triet*.