Chandra Levy's family struggles to cope.

Byline: Elsa C. Arnett

MODESTO, Calif. _ Chandra Levy's mother gave her daughter one bit of advice before she left for her internship in the nation's capital: ``Now, don't go and become another Monica Lewinsky.''

The quip was part joke, part warning. Susan Levy knew that her daughter could be too trusting of people she cared for, and that meant she could also get hurt.

In the four months since Chandra vanished, Susan and Robert Levy have been analyzing every detail, every conversation, every possible clue that could help them figure out what happened to their spirited, independent 24-year-old daughter, who was last seen April 30 in Washington.

Most of this is being done behind the closed plantation shutters in their spacious ranch home next to orchards just outside downtown Modesto.

The Levys rarely give interviews to the armies of news crews camped round-the-clock on the sidewalk outside their front yard.

But …