Perhaps you should try some spelling variations:
"sung doi chieu snippets" » "sung doi code snippets", "sung doc hieu snippets", "sung doi chi snippets", "sung ho chieu snippets", "dung doi chieu snippets", "vung doi chieu snippets", "huong doi chieu snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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 java java snippets") or ("sung doi chieu snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("sung doi chieu snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( sung doi chieu snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("sung doi chieu snippets"))) or ("locating bug core snippets"))*.