Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
thai tuc » thai thuc, thai thuy, thai hoc
van thai » van thoai, van tai, van hai
hieu van » hieu va, thien van, lieu va
tai cua » thai cua, tai cuc, tri cua
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
sach ky » sach y, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
tuc va » thuc va, truc va, tuc xa
sac ky » cac ky, sai ky

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: su ((sach ky) OR (sac ky)) ((nang xa) OR (nang ma)) hoi. hieu van thai tuc va tinh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) ((nang xa) OR (nang ma)) hoi. hieu van thai tuc va tinh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) ((nang xa) OR (nang ma)) hoi. hieu van thai tuc va tinh tai cua tre*.