Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
xa thanh » va thanh, ha thanh, ta thanh
thanh vi » hanh vi, thanh va, thanh ve
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho
o hai » co hai, so hai, o lai

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) or (co sach)) ky nang ((x hoi) or (o hai)). hieu va cham tuc xa thanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (co sach)) ky nang ((x hoi) OR (o hai)). hieu va cham tuc xa thanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (co sach)) ky nang ((x hoi) or (o hai)). hieu va cham tuc xa thanh vi cua viet*.