Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
lam xuc » cam xuc, lam duoc
xuc van » duc van, luc van, vuc van
hoi cua » hoi chuc
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, 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 ky nang ((x hoi) OR (x ho)). hieu van lam xuc van hanh ((di cua) OR (hoi cua)) vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((x hoi) OR (x ho)). hieu van lam xuc van hanh ((di cua) or (hoi cua)) vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) OR (x ho)). hieu van lam xuc van hanh ((di cua) or (hoi cua)) vat*.