Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh dai » hanh tai, hanh dao, vanh dai
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren
va hanh » van hanh, va thanh, va danh
te sach » toc sach
ty hang » ly hang, ty xang, thi hang
va cam » va cham, va cao, va cai
xuc va » duc va, tuc va, luc va
hang o » hang do, hang o2, hoang o
o hoi » co hoi, o hoc, o hai

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 ty hang o hoi. hieu ((va cam) OR (va cac)) xuc va hanh dai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang o hoi. hieu ((va cam) OR (va cac)) xuc va hanh dai ((cuu tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang o hoi. hieu ((va cam) OR (va cac)) xuc va hanh dai ((cuu tre) or (cau treo))*".