Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ky trong » ly trong, ke trong, cay trong
trong xa » trong xay, trong ca, trong xu
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
cac xuc » cam xuc, cac nuoc, chat xuc
xuc ban » duc ban, cuc ban, quoc ban
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky trong xa hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh ((thai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky trong xa hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh ((thai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky trong xa hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh ((thai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky trong xa hoi. ((hieu ve) OR (hieu van)) cac xuc ban hanh ((thai cua) or (dai cua)) tre*.