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

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 hai))) or (xa hoi)). hieu va 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 hai))) OR (xa hoi)). hieu va hau tuc va danh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((((x hoi) or (o hai))) or (xa hoi)). hieu va hau tuc va danh vai cuu tre*.