Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cua viet » ca viet, hoa viet, cua vat
vien dao » vien dai, vien da, vien cao
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, nang ma
dao duc » giao duc, tao duoc
sanh ky » hanh ky, sang ky, nganh ky
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
so sanh » do sanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky nang xa hoi. hieu vien dao duc ((van hanh) or (va danh)) vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang xa hoi. hieu vien dao duc ((van hanh) OR (va danh)) vi ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang xa hoi. hieu vien dao duc ((van hanh) or (va danh)) vi ((cua tre) or (cua viet))*.