Perhaps you should try some spelling variations:
hang thai » hoang thai, hang tai, hong thai
hang hai » hoang hai, hang tai, thanh hai
cua tre » cua te, cuu tre, cua triet
sang ky » sang kyo, dang ky, tang ky
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
san ky » van ky, dan ky, ban ky
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) OR (sang ky)) lang xa hoi. hieu va cao duc va ((hang thai) or (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) lang xa hoi. hieu va cao duc va ((hang thai) OR (hang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (sang ky)) lang xa hoi. hieu va cao duc va ((hang thai) or (hang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (sang ky)) lang xa hoi. hieu va cao duc va ((hang thai) or (hang hai)) cua tre*.