Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hong duc chat snippets" » "dang duc chat snippets", "ton duc chat snippets", "hong duoc chat snippets", "hong doc chat snippets", "hong du 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: (((("hong duc chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hong duc chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hong duc chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hong duc chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.