Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"fan mon toan snippets" » "fan manh toan snippets", "fan minh toan snippets", "fan nin toan snippets", "dan mon toan snippets", "ban mon toan snippets", "fan mo toan 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: (((("fan mon toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("fan mon toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( fan mon toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("fan mon toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.