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