Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai
hac luc » nhan luc, than luc
cua tre » cua te, cuu tre, cua triet
can ky » van ky, ban ky, tan ky
dan ky » van ky
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((can ky) or (dan ky)) lang xa hoi. hieu van hac luc va thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((can ky) OR (dan ky)) lang xa hoi. hieu van hac luc va thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) or (dan ky)) lang xa hoi. hieu van hac luc va thanh di cua tre*.