Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sang tac toi snippets" » "sang tao toi snippets", "sang tai toi snippets", "sang than toi snippets", "sang cac toi snippets", "sang tac thi snippets", "sang cac thoi 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: (((("sang tac 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: (((("sang tac toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sang tac toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sang tac toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.