Perhaps you should try some spelling variations:
hang tri » hang tai, lang tri, nang tri
ban hang » ngan hang
cua tre » cua te, cuu tre, cua triet
dac ban » cac ban, dac san, duc ban
cac dac » cac dan, cac dai, cac bac
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
tu sac » tu sach, tu cac, tu lac
nang o » nang co, nang ho, nang ro
tu san » thu san, tu ban, tu can
tu bac » tu ban, tu cac, tu bat
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sac) or (tu bac))) or (tu san)) ky nang o lai. hieu ve cac dac ban hang tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sac) OR (tu bac))) OR (tu san)) ky nang o lai. hieu ve cac dac ban hang tri cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sac) or (tu bac))) or (tu san)) ky nang o lai. hieu ve cac dac ban hang tri cua tre*.