Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cuc ban » cua ban, cac ban, cuu ban
cac van » cac dan
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu lai
tu cai » tu cac, tu can, tu bai
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) OR (tu cai)) ky nang xa hoi. hieu ve cam ((cuc ban) or (cac van)) chinh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu cai)) ky nang xa hoi. hieu ve cam ((cuc ban) OR (cac van)) chinh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu cai)) ky nang xa hoi. hieu ve cam ((cuc ban) or (cac van)) chinh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu cai)) ky nang xa hoi. hieu ve cam ((cuc ban) or (cac van)) chinh tri cua tre*.