Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"data van chu snippets" » "data phan chu snippets", "dang van chu snippets", "dao van chu snippets", "data van chi snippets", "data van phu snippets", "data van cau 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: (((("data van chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data van chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( data van chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data van chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.