Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
xa khanh » van khanh, dat khanh, hoa khanh
xa thanh » va thanh, ha thanh, ta thanh
tu sach » thu sach, su sach, te sach
nam tuc » nam thuc, nam truc, nam tu
xa hanh » va hanh, da hanh, na hanh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) or (xa thanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) OR (xa thanh)) lai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu van nam tuc ((((xa hanh) OR (xa khanh))) or (xa thanh)) lai cua tre*".