Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"than doc chat snippets" » "than hoc chat snippets", "than toc cham snippets", "than hop chat snippets", "thanh doc chat snippets", "phan doc chat snippets", "tran doc 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: (((("than doc 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: (((("than doc chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( than doc chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("than doc chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.