Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
nuoc van » nuoc va, nuoc san, luoc van
te sach » toc sach
lai cuu » lai cua, lai chau, lai cuoc
va tham » van tham, va cham, va thuat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
co hoi » co hoc, co loi

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: te sach ty nang ((co hoi) OR (cau hoi)). hieu ((va tham) OR (va thanh)) nuoc van hanh lai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((co hoi) or (cau hoi)). hieu ((va tham) OR (va thanh)) nuoc van hanh lai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((co hoi) or (cau hoi)). hieu ((va tham) OR (va thanh)) nuoc van hanh lai cuu tre*.