Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu va » lieu va, hieu qua
duc ban » duc tan, duc man, duc manh
dua ban » dia ban, cua ban, qua ban
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang x hoi. hieu va cam ((((duc ban) or (dua ban))) or (duc van)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang x hoi. hieu va cam ((((duc ban) OR (dua ban))) OR (duc van)) thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang x hoi. hieu va cam ((((duc ban) or (dua ban))) or (duc van)) thanh vai cua tre*.