Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dong cho con snippets" » "dung cho con snippets", "dong co con snippets", "dong hoc con snippets", "dong cho cong snippets", "dong cho lon snippets", "dong cho can 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: (((("dong cho con snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cho con snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cho con snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cho con snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.