Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hanh du snippets" » "thuc hanh du snippets", "thu thanh du snippets", "thuy hanh du snippets", "thu hanh dua snippets", "thu hanh tu snippets", "thu hanh de 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 du 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 du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hanh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hanh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.