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