Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"thong co chi snippets" » "thong o chi snippets", "trong co chi snippets", "thong cong chi snippets", "thong con chi snippets", "thong ho chi snippets", "thong co khi 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: (((("thong co chi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong co chi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong co chi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong co chi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.