Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat dao tong snippets" » "hat dao trong snippets", "hat dao dong snippets", "hat tao trong snippets", "hat dan tong snippets", "hat dam tong snippets", "hat do tong 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: (((("hat dao tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat dao tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat dao tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat dao tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.