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", "han using java slippers"
"cong hung code snippets" » "cong chung code snippets", "cong huong code snippets", "cong dung code snippets", "cong hung code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("han using java snippets") or ("cong hung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han using java snippets") OR ("cong hung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han using java snippets ) or ( cong hung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han using java snippets") or ("cong hung code snippets"))) or ("locating bug code snippets"))*.