Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
nang dai » nang dau, nang tai, lang dai
thuc xa » thuc xay, tuc xa, thuc ha
tai cua » thai cua, tai cuc, tri cua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
dai hoi » dai hoc, dai hai, dai moi
sang ky » sang kyo, dang ky, tang ky
san ky » van ky, dan ky, ban ky
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) OR (sang ky)) nang dai hoi. lieu va nay ((thuc xa) or (thuc va)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) nang dai hoi. lieu va nay ((thuc xa) OR (thuc va)) hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (sang ky)) nang dai hoi. lieu va nay ((thuc xa) or (thuc va)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (sang ky)) nang dai hoi. lieu va nay ((thuc xa) or (thuc va)) hanh tai cua tre*.