Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi van noi snippets" » "do van noi snippets", "doi va noi snippets", "doi ban noi snippets", "doi van loi snippets", "doi van ngoc 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: (((("doi van noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi van noi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi van noi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi van noi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.