Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thu sach » thuat sach, thuoc sach, thu hoach
cuu tre » cua tre, cau treo
va hanh » van hanh, va thanh, va danh
nam xuc » cam xuc, nam xua, nam thuc
hieu tu » chieu tu, hieu tuc, hien tu
tu sach » su sach, te sach, tu cach
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, luc va
tu nam » su nam
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: ((tu sach) or (thu sach)) ky nang o hoi. hieu tu nam xuc va hanh vi ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang o hoi. hieu tu nam xuc va hanh vi ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang o hoi. hieu tu nam xuc va hanh vi ((cuu tre) or (cau tren))*.