Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
thi van » thi lan, thi hanh, thi nang
van bac » van ban, van bao, van hac
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
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. thi van bac duc van hanh di ((su triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. thi van bac duc van hanh di ((su triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. thi van bac duc van hanh di ((su triet) or (cuu tre))*.