Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"giang sat chat snippets" » "giang san chat snippets", "giang nhat chat snippets", "giang day chat snippets", "giang soat chat snippets", "giang suat chat snippets", "giang vat chat snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 java java snippets") or ("giang sat chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("giang sat chat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( giang sat chat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("giang sat chat snippets"))) or ("locating bug code snippets"))*.