Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thao lu cac snippets" » "thao cua cac snippets", "thao lap cac snippets", "than luc cac snippets", "thao tu cac snippets", "thao li cac snippets", "thao ly cac 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: (((("thao lu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thao lu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thao lu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thao lu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.