Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
thai hoc » dai hoc, bai hoc, hoi hoc
thai tuc » thai thuc, thai thuy, thu tuc
cua tre » cua te, cuu tre, cua triet
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang

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 ty lang xa hoi. lieu va ((thai tuc) OR (thai hoc)) va danh vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. lieu va ((thai tuc) OR (thai hoc)) va danh vi ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty lang xa hoi. lieu va ((thai tuc) OR (thai hoc)) va danh vi ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. lieu va ((thai tuc) OR (thai hoc)) va danh vi ((cua tre) or (su triet))*.