Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"long cua du snippets" » "luong cua du snippets", "cong cua du snippets", "dong cua du snippets", "long cua duc snippets", "long cua ndu snippets", "long cua su 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: (((("long cua du snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("long cua du snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long cua du snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long cua du snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.