Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
nang mai » nang ma, nang tai, lang mai
thuc xay » thuc day, tuc xay, thuat xay
thuc xa » tuc xa, thuc va, thuc ha
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
va ngay » va nay, tan ngay
mai hoi » mai khoi, dai hoi, lai hoi
sang ky » sang kyo, dang ky, tang ky
san ky » van ky, dan ky, ban ky

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