Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van canh toc snippets" » "van anh toc snippets", "van hanh toc snippets", "van manh toc snippets", "van canh tac snippets", "van dan toc snippets", "van hanh tot 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 canh toc 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 canh toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van canh toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van canh toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.