Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
chay tu » chay tui, chai tu, chay dua
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
cay tu » cau tu, tay tu, cac tu
ky va » ke va, my va, ky la

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 ((ky va) OR (ly va)) xa hoi. hieu va ((cay tu) or (chay tu)) va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky va) OR (ly va)) xa hoi. hieu va ((cay tu) OR (chay tu)) va hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky va) OR (ly va)) xa hoi. hieu va ((cay tu) or (chay tu)) va hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky va) OR (ly va)) xa hoi. hieu va ((cay tu) or (chay tu)) va hanh tai cuu tre*.