Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
va bao » va bai
bao do » ban do, dao do, cao do
do va » do van, so va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang cao hoi. lieu va bao do va hanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang cao hoi. lieu va bao do va hanh va ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach y nang cao hoi. lieu va bao do va hanh va ((cua tre) or (cuu tre))*.