Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thi hoan snippets" » "duc thi hoa snippets", "duc thi hanh snippets", "duc thi hong snippets", "duc thai hoan snippets", "luc thi hoan snippets", "duc tho hoan 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: (((("duc thi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc thi hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thi hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thi hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.