Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
tai khoi » tai khoa, mai khoi, tao khoi
hanh tai » thanh tai, hang tai, han tai
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuu tre » cua tre, cau tren, cau treo
y tang » ky tang, 6 tang, 7 tang
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y tang tai khoi. hieu ve cham ((xuc va) OR (duc va)) hanh tai ((cuu tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y tang tai khoi. hieu ve cham ((xuc va) OR (duc va)) hanh tai ((cuu tre) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y tang tai khoi. hieu ve cham ((xuc va) OR (duc va)) hanh tai ((cuu tre) or (dau tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach y tang tai khoi. hieu ve cham ((xuc va) OR (duc va)) hanh tai ((cuu tre) or (dau tren))*.