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