Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tai cua » thai cua, tai cuc, tri cua
xa hanh » xa thanh, xa khanh, va hanh
thuc xa » thuc xay, tuc xa, thuc va
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
cua tre » cua te, cuu tre, cua triet
va nam » van nam, va nay
ma hoi » mai hoi, xa hoi, ma hoa

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

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