Perhaps you should try some spelling variations:
"dung hanh voi snippets" » "dung thanh voi snippets", "dang hanh voi snippets", "dung danh voi snippets", "dung hanh vi snippets", "dung hanh noi snippets", "dung hanh moi snippets"
"dung java java snippets" » "dung va java 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 hanh voi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hanh voi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hanh voi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hanh voi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.