Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
va coc » va cuoc, va cac, va hoc
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
x hoi » o hoi, x ho, 5 hoi

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: ((tu sach) OR (thu hoach)) ky nang ((x hoi) OR (xa hoi)). hieu va coc luc va danh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu hoach)) ky nang ((x hoi) OR (xa hoi)). hieu va coc luc va danh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky nang ((x hoi) OR (xa hoi)). hieu va coc luc va danh di cua tre*.