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