Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va
cac xuc » cam xuc, cac nuoc, chat xuc
va dinh » van dinh, va kinh, va tinh
su tien » su kien, su hien, tu tieng

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 ty xang xa hoi. ((hieu ve) or (hieu van)) cac xuc ((va dinh) or (ban hanh)) lai su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. ((hieu ve) OR (hieu van)) cac xuc ((va dinh) OR (ban hanh)) lai su tien.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. ((hieu ve) or (hieu van)) cac xuc ((va dinh) or (ban hanh)) lai su tien*.