Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh thi » thanh tai, nhanh thi, thanh tri
cham duc » pham duc, pham duy, phan duc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thi cua » thai cua, thi cuc, tri cua
cua tre » cua te, cuu tre, cua triet
sac ky » sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (cac ky)) nang xa hoi. hieu ve ((cham duc) OR (cham soc)) van thanh thi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) nang xa hoi. hieu ve ((cham duc) OR (cham soc)) van thanh thi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (cac ky)) nang xa hoi. hieu ve ((cham duc) OR (cham soc)) van thanh thi cua tre*".