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