Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tu cach » tu cac
te sach » toc sach
hieu le » hieu ve, hieu he, hieu ly
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
le nam » ly nam, he nam, le na
thu va » thuc va, thue va, tu va
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: ((tu cach) or (te sach)) ky nang x hoi. hieu le nam thu va hanh vi ((va triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang x hoi. hieu le nam thu va hanh vi ((va triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang x hoi. hieu le nam thu va hanh vi ((va triet) or (cuu tre))*.