Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh va » hanh va, thanh ha, thanh ve
sang mai » sang ma, sang tai, lang mai
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
tu bai » tu ban, tu bat, te bai
tu cai » tu cac, tu can, tu cay
ve am » va am
thuc » thu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cai) OR (tu bai)) ky sang mai hoi. hieu ve am thuc vat ((thanh va) OR (thanh van)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cai) or (tu bai)) ky sang mai hoi. hieu ve am thuc vat ((thanh va) OR (thanh van)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu cai) or (tu bai)) ky sang mai hoi. hieu ve am thuc vat ((thanh va) OR (thanh van)) cua tre*.