Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat bai toan snippets" » "hat bai tap snippets", "tat bai toan snippets", "ham bai toan snippets", "hat ba 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: (((("hat bai 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: (((("hat bai toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat bai toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat bai toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.