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
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac toc » cac toi, cac nuoc, cac thoi
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
toc va » hoc va, toc ta, tuc va
cua te » cua tu

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 xa hoi. hieu van cac toc va hanh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((canh ky) OR (nganh ky)) nang xa hoi. hieu van cac toc va hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((canh ky) or (nganh ky)) nang xa hoi. hieu van cac toc va hanh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu ((canh ky) or (nganh ky)) nang xa hoi. hieu van cac toc va hanh vi ((cua tre) OR (cua te))*.