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