Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, vuc van
tu bac » tu ban, tu cac, tu bat
ma lai » mua lai, mat lai, va lai
tu san » thu san, tu ban, tu can
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu san)) ky nang ma lai. hieu ((ve cac) or (vien bach)) xuc van hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu san)) ky nang ma lai. hieu ((ve cac) OR (vien bach)) xuc van hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu san)) ky nang ma lai. hieu ((ve cac) or (vien bach)) xuc van hanh tai cua tre*.