Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
va cam » va cac, va cao, va cai
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ((va cam) or (va cham)) luc van hanh kem ((cuu tre) or (cau tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ((va cam) OR (va cham)) luc van hanh kem ((cuu tre) OR (cau tao)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ((va cam) or (va cham)) luc van hanh kem ((cuu tre) or (cau tao))*.