Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
hieu van » hieu va, thien van, lieu va
canh ky » hanh ky, canh tay, thanh ky
van cac » van hac, van cau, van bac
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
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: thu ((canh ky) or (nganh ky)) nang x hoi. hieu van cac hoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((canh ky) OR (nganh ky)) nang x hoi. hieu van cac hoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((canh ky) or (nganh ky)) nang x hoi. hieu van cac hoc va hanh vi cua tre*.