Oracle某些特定的生僻字乱码怎么解决？

[agura]

情况是这样，Oracle字符集用的是iso-8859-1，都已转过码。有些GBK特有的字是正常的，如“镕”等；有些则不正常，如“湧”、“濛”等，请问这是如何？

[agura]

PARAMETER VALUE

NLS_LANGUAGE AMERICAN
NLS_TERRITORY AMERICA
NLS_CURRENCY $
NLS_ISO_CURRENCY AMERICA
NLS_NUMERIC_CHARACTERS .,
NLS_CHARACTERSET WE8ISO8859P1
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE AMERICAN
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY $
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_RDBMS_VERSION 9.2.0.1.0

[agura]

濛，GBK：9DF7
湧，GBK：9CA5

[agura]

而且奇怪的是，我在GOOGLE和百度上搜这两个字，居然也被转掉了……