Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van choi noi snippets" » "van chi noi snippets", "van cho noi snippets", "san choi noi snippets", "van choi voi snippets", "van khoi noi snippets", "van hoc noi 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: (((("van choi noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van choi noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van choi noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van choi noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.