Perhaps you should try some spelling variations:
"using ca cach snippets" » "using ca code snippets", "using a cach snippets", "using c cach snippets", "using cfd cach snippets", "using cai cach snippets", "using cac cach snippets", "using ca cac 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: (((("using ca 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: (((("using ca cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using ca cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using ca cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.