Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong tan cach snippets" » "cong tac cach snippets", "cong san cach snippets", "cong thanh cach snippets", "cong dan cach snippets", "cong tap cach snippets", "cong tinh cach 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: (((("cong tan cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong tan cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tan cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tan cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.