Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung hat ca snippets" » "dung chat ca snippets", "dung nhat ca snippets", "dung phat ca snippets", "dung hat cua snippets", "dung tat ca snippets", "dung hat va 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 hat 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 hat ca snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hat ca snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hat ca snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.