Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac dac » cac dan, cac dai, cac bac
va danh » va dinh, va dan, va hanh
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 sang ky lang xa hoi. hieu va cac dac ((va danh) or (((van hanh) OR (van thanh)))) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sang ky lang xa hoi. hieu va cac dac ((va danh) OR (((van hanh) OR (van thanh)))) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky lang xa hoi. hieu va cac dac ((va danh) or (((van hanh) OR (van thanh)))) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: so sang ky lang xa hoi. hieu va cac dac ((va danh) or (((van hanh) OR (van thanh)))) vi cua tre*.