Perhaps you should try some spelling variations:
sang tao » hang tai
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
thanh ha » thanh hoa, thanh hai, nhanh ha
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
cau tu » dau tu, cau truc
ha cua » hoa cua, hai cua, nha cua

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) or (toc sach)) ky sang tao hoi. hieu ve cau tu va thanh ha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky sang tao hoi. hieu ve cau tu va thanh ha cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky sang tao hoi. hieu ve cau tu va thanh ha cua tre*.