Perhaps you should try some spelling variations:
thanh thai » thanh hai, nhanh thai, thanh thao
thanh tai » thanh hai, thanh toan, doanh tai
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
su sac » su sach, su cac, su xac
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: su sac ky lang xa hoi. hieu ve ((tao duoc) or (pham duc)) van ((thanh thai) OR (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. hieu ve ((tao duoc) OR (pham duc)) van ((thanh thai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang xa hoi. hieu ve ((tao duoc) or (pham duc)) van ((thanh thai) OR (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. hieu ve ((tao duoc) or (pham duc)) van ((thanh thai) OR (thanh tai)) cua tre*.