Perhaps you should try some spelling variations:
"dung san chieu snippets" » "dung van hieu snippets", "dung van chien snippets", "dung san chi snippets", "dong san chieu snippets", "dung sai chieu snippets", "dung luan chieu 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 san chieu 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 san chieu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung san chieu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung san chieu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.