Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
cam luc » cam xuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lai roi » loi roi
lai hoi » dai hoi, lai hoa, mai hoi
ty nang » ky nang, ty xang, ty hang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang ((lai hoi) or (lai roi)). hieu ve ((cam luc) or (cau luc)) va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ((lai hoi) OR (lai roi)). hieu ve ((cam luc) OR (cau luc)) va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ((lai hoi) or (lai roi)). hieu ve ((cam luc) or (cau luc)) va hanh tai cua tre*.