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