Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh vai » danh sai, danh va, doanh van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van hau » van ha, van hai, van dau
hau tuc » cau truc, hieu tuc, thai tuc
va danh » va dinh, va dan, va hanh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
x hoi » x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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 ky nang ((((x hoi) OR (o hoi))) or (xa hoi)). hieu van hau tuc va danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((((x hoi) OR (o hoi))) OR (xa hoi)). hieu van hau tuc va danh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((((x hoi) OR (o hoi))) or (xa hoi)). hieu van hau tuc va danh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((((x hoi) OR (o hoi))) or (xa hoi)). hieu van hau tuc va danh vai cuu tre*.