Perhaps you should try some spelling variations:
"dung chau chat snippets" » "dung chau code snippets", "dung chat chat snippets", "dung cau chat snippets", "dung cho chat snippets", "dung chuan chat snippets", "dung cao chat snippets", "dung phap chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"hang java java snippets" » "hang va java snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung chau chat snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung chau chat snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung chau chat snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung chau chat snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.