Perhaps you should try some spelling variations:
ha triet » nha triet, va triet, hanh triet
hanh lam » thanh lap, hanh kem, hanh va
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
bao luc » bao thuc
bao tuc » bao thuc, dao tuc, bao tung
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
lang ha » long ha
lang xa » dang xay, lang van
lam ha » nam ha, dam ha, lam chat

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 tuc) OR (bao luc)) va hanh lam ha 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 tuc) OR (bao luc)) va hanh lam ha 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 tuc) OR (bao luc)) va hanh lam ha triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((lang xa) or (lang ha)) hoi. hieu van ((bao tuc) OR (bao luc)) va hanh lam ha triet*.