Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tu can snippets" » "van thu can snippets", "van du can snippets", "ban tu can snippets", "van tu ban snippets", "van tu cac snippets", "van su can 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 tu 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 tu can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tu can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tu can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.