Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan lee doan snippets" » "tan le doan snippets", "tan ket doan snippets", "tan lee gwan snippets", "han lee doan 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: (((("tan lee doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan lee doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan lee doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan lee doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.