Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho van toan snippets" » "tho van tuan snippets", "tho van tan snippets", "tho van thanh snippets", "thao van toan snippets", "ho van toan snippets", "tho dan 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: (((("tho van 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: (((("tho van toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho van toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho van toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.