Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hanh oi snippets" » "thuc hanh oi snippets", "thu thanh oi snippets", "thuy hanh oi snippets", "thu hanh noi snippets", "thu hanh moi snippets", "thu hanh voi 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: (((("thu hanh oi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hanh oi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hanh oi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hanh oi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.