Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi luan xon snippets" » "thi lan xon snippets", "thi xuan xon snippets", "thi loan xon snippets", "thi luan von snippets", "thi luan hoan snippets", "thi luan cong 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: (((("thi luan xon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi luan xon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi luan xon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi luan xon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.