Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan dung hon snippets" » "van dung hon snippets", "dan dung hon snippets", "lan hung hon snippets", "lan dung hong snippets", "lan dung hoc snippets", "lan dung con 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 dung hon 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 dung hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan dung hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan dung hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.