Perhaps you should try some spelling variations:
"dung hoai cach snippets" » "dung hoai code snippets", "dung hai cach snippets", "dang hoai cach snippets", "dung hoa cach snippets", "dung loi cach snippets", "dung hoa cac snippets", "dung cai cach snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung 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 java java snippets") or ("dung hoai cach snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung hoai cach snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung hoai cach snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung hoai cach snippets"))) or ("locating bug core snippets"))*.