Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
tam tu » nam tu, cam tu, dam tu
thuc » thu

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 y tang xa hoi. hieu ve ((am thuc) or (tam tu)) va hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang xa hoi. hieu ve ((am thuc) OR (tam tu)) va hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y tang xa hoi. hieu ve ((am thuc) or (tam tu)) va hanh tai cua tre*.