Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
va thanh » ban thanh, va tinh, le thanh
nang xa » nang x, lang xa, nang ma
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac 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: te sac ky nang xa hoi. hieu ((vien cac) or (va cac)) duc ((va thanh) OR (gia thanh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ((vien cac) OR (va cac)) duc ((va thanh) OR (gia thanh)) van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ((vien cac) or (va cac)) duc ((va thanh) OR (gia thanh)) van cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ((vien cac) or (va cac)) duc ((va thanh) OR (gia thanh)) van cua tre*.