Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuoc lap » thuoc la, thuoc luan, thuoc phap
lam thuoc » nam thuoc, am thuc, cay thuoc
trinh va » trinh van, trinh vat, trinh ve
hieu van » hieu va, thien van, lieu va
van lam » van nam
tu sach » thu sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
su sach » so sach, vu sach
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) OR (su sach)) ky ((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) OR (su sach)) ky ((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) OR (su sach)) ky ((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) OR (su sach)) ky ((lang xa) or (nang x)) hoi. hieu van lam thuoc lap trinh va cua triet*.