Perhaps you should try some spelling variations:
nang hoi » nang noi, nang hoc, nang ho
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hoi hoi » hoi hoc, hoc hoi, hoi doi
xuc van » duc van, luc van, vuc van
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao

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 ty nang hoi hoi. hieu ((ve cam) OR (va cam)) xuc van hanh tai cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang hoi hoi. hieu ((ve cam) or (va cam)) xuc van hanh tai cuu tre*.