Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"keo cua toan snippets" » "keo cuu toan snippets", "keo xuan toan snippets", "keo cua thanh snippets", "keo sua toan snippets", "kho cua toan snippets", "cheo cua 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: (((("keo cua 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: (((("keo cua toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( keo cua toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("keo cua toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.