Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, gia thanh
ta thanh » tai thanh, va thanh, ha thanh
su sach » so sach, vu sach
hieu va » hieu qua
sach ty » sach y, sach tu, sach thu
ve cua » le cua, de cua, te cua
xang x » nang x
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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 ty xang x hoi. ((hieu va) OR (lieu va)) nam thu ((xa thanh) OR (ta thanh)) ve cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang x hoi. ((hieu va) or (lieu va)) nam thu ((xa thanh) OR (ta thanh)) ve cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang x hoi. ((hieu va) or (lieu va)) nam thu ((xa thanh) OR (ta thanh)) ve cua te*.