Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc vat doan snippets" » "hoc van doan snippets", "hoc van doanh snippets", "hoc vay doanh snippets", "hoc va doan snippets", "hoc viet doan snippets", "thuc vat 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: (((("hoc vat 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: (((("hoc vat doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc vat doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc vat doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.