Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi dai moi snippets" » "thi dai moi snippets", "phi tai moi snippets", "khi dai moi snippets", "phi doi moi snippets", "phi dai hoi 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: (((("phi dai moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi dai moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi dai moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi dai moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.