Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
van han » van hanh, van phan, van nhan
nang ra » nang ma, lang ra, nang ro
xuc van » duc van, luc van, vuc van
tu bac » tu ban, tu cac, tu bat
ra lai » ra glai, ru lai, va lai
tu san » thu san, tu ban, tu can
ve cac » va 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 ra lai. hieu ((ve cac) or (vien cac)) xuc van han tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu san)) ky nang ra lai. hieu ((ve cac) OR (vien cac)) xuc van han tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu san)) ky nang ra lai. hieu ((ve cac) or (vien cac)) xuc van han tai cua tre*.