Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, ta thanh
hieu van » hieu va, thien van, lieu va
su sach » so sach
cac tac » cac toc, cac bac, cac dac
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
van cac » van hac, van cau, van bac
vu sach » vu bach, vu khach
tac xa » tuc xa, tac da
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) OR (vu sach)) ky nang x hoi. hieu van cac tac xa thanh ((vai cua) OR (lai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky nang x hoi. hieu van cac tac xa thanh ((vai cua) OR (lai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. hieu van cac tac xa thanh ((vai cua) OR (lai cua)) tre*.