Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
tai hoa » tai khoa, thai hoa, thi hoa
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va
loc va » hoc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y tang tai hoa. hieu ve cau ((luc va) OR (loc va)) hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y tang tai hoa. hieu ve cau ((luc va) OR (loc va)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y tang tai hoa. hieu ve cau ((luc va) OR (loc va)) hanh tai cua tre*.