Perhaps you should try some spelling variations:
cau treo » cau theo, cau triet, cau trieu
cau tren » cu tren, dau tren, ca tren
toc sach » hoc sach, doc sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
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) OR (toc sach)) ty nang o hoi. hieu va cam xuc va hanh tai ((cau tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang o hoi. hieu va cam xuc va hanh tai ((cau tren) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty nang o hoi. hieu va cam xuc va hanh tai ((cau tren) or (cau treo))*".