Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, hinh tai
su sach » vu sach
han tai » hang tai, nhan tai, van tai
cac luc » cau luc, coc luc, cac nuoc
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ty xang xa hoi. hieu va cac luc va ((hanh tai) OR (han tai)) cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ty xang xa hoi. hieu va cac luc va ((hanh tai) OR (han tai)) cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ty xang xa hoi. hieu va cac luc va ((hanh tai) OR (han tai)) cua tu*.