Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat toan do snippets" » "nhat toan do snippets", "thuat toan do snippets", "hach toan do snippets", "hat toan ho snippets", "hat toan co snippets", "hat toan du 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 toan do 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 toan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat toan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat toan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.