Perhaps you should try some spelling variations:
"phau sinh co snippets" » "pham minh co snippets", "nhan sinh co snippets", "phau benh co snippets", "phau sinh con snippets", "phau kinh co snippets", "phau tinh co 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: (((("phau sinh co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phau sinh co snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phau sinh co snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phau sinh co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.