Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan kho toc snippets" » "lam kho toc snippets", "lan cho toc snippets", "van kho toc snippets", "lan ho toc snippets", "lan khoa hoc 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: (((("lan kho 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: (((("lan kho toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan kho toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan kho toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.