Perhaps you should try some spelling variations:
so sanh » do sanh
ky lang » ky dang, tay lang
ky tang » ky dang, kho tang, ky trong
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 lang) OR (ky tang))) or (ky nang)) xa hoi. hieu va cac duc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ((((ky lang) OR (ky tang))) OR (ky nang)) xa hoi. hieu va cac duc va hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ((((ky lang) OR (ky tang))) or (ky nang)) xa hoi. hieu va cac duc va hanh vi cua tre*".