Perhaps you should try some spelling variations:
"han using java snippets" » "han using data snippets", "han ung java snippets", "h2o using java snippets", "han ping java snippets"
"dung nhan co snippets" » "dung luan co snippets", "dung nhan con snippets", "dung phan co snippets", "dung nhan mo 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 nhan co snippets") or ("han using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung nhan co snippets") OR ("han using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung nhan co snippets ) or ( han using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung nhan co snippets") or ("han using java snippets"))) or ("locating bug code snippets"))*.