Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van choi can snippets" » "van chi can snippets", "van cho can snippets", "san choi can snippets", "van choi dan snippets", "van choi wan 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 can 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 can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van choi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van choi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.