Perhaps you should try some spelling variations:
"khang using java snippets" » "khang sinh java snippets", "khang using data snippets", "khang using java slippers"
"cong tac code snippets" » "cong ty code snippets", "cong tac de snippets", "cong tac co snippets", "cong tac 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: (((("khang using java snippets") or ("cong tac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khang using java snippets") OR ("cong tac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khang using java snippets ) or ( cong tac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khang using java snippets") or ("cong tac code snippets"))) or ("locating bug code snippets"))*.