Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
tay hoi » tay ho, tao hoi, tay thai
hieu ve » hieu va
tu sac » tu sach, tu cac, tu bac
va tay » va thay, van tay, ha tay
tu san » thu san, tu ban, tu can
ke va » te va

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 san)) ke va tay hoi. ((hieu ve) or (hieu van)) cac cuc ban hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ke va tay hoi. ((hieu ve) OR (hieu van)) cac cuc ban hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu san)) ke va tay hoi. ((hieu ve) or (hieu van)) cac cuc ban hanh tai cua tre*".