Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
va nang » van nang, da nang, cam nang
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ly dat » ly dai, ly mat, ly da
ly dao » ly dai
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((y nang) or (va nang)) xa hoi. hieu ((ly dat) or (ly dao)) nuoc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((y nang) OR (va nang)) xa hoi. hieu ((ly dat) OR (ly dao)) nuoc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: co sach ((y nang) or (va nang)) xa hoi. hieu ((ly dat) or (ly dao)) nuoc va hanh vi cuu tre*.