Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"dang using java snippets" » "dang sinh java snippets", "data using java snippets", "dang ung java snippets", "dang using data snippets"
"dao van cong snippets" » "dao van dong snippets", "dao van phong snippets", "dao phan cong snippets", "dang van cong 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 using java snippets") or ("dao van cong snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang using java snippets") OR ("dao van cong snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dang using java snippets ) or ( dao van cong snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang using java snippets") or ("dao van cong snippets"))) or ("locating bugs code snippets"))*.