Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
hanh lam » thanh lap, hanh kem, hanh va
bao thuc » cao thuoc, am thuc, va thuc
bao truc » ba truc, vao truc, bao trung
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
lang xa » dang xay, lang van
lang ha » long ha
lam va » nam va, dam va, lam ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((lang xa) or (lang ha)) hoi. hieu van ((bao truc) OR (bao thuc)) va hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((lang xa) OR (lang ha)) hoi. hieu van ((bao truc) OR (bao thuc)) va hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((lang xa) or (lang ha)) hoi. hieu van ((bao truc) OR (bao thuc)) va hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) or (lang ha)) hoi. hieu van ((bao truc) OR (bao thuc)) va hanh lam va triet*.