Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap van bon snippets" » "pham van bon snippets", "phan van bon snippets", "phap han bon snippets", "phap van ban snippets", "phap van dong snippets", "phap van 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: (((("phap van 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: (((("phap van bon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap van bon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap van bon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.