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