Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » so sach, vu sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
cac xuc » cam xuc, cac nuoc, chat xuc
di su » doi su, ki su, da su

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 xang xa hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) or (va danh)) di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) OR (va danh)) di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) or (va danh)) di su triet*".