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 dac » cac dan, cac dai, cac bac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
dac va » duc va, day va, dat va
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 dac 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 dac va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ((((ky lang) or (ky tang))) or (ky nang)) xa hoi. hieu va cac dac va hanh vi cua tre*.