Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi lu toan snippets" » "thi le toan snippets", "thi ly toan snippets", "thi duc toan snippets", "thi luu toan snippets", "thi vu toan 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 lu toan 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 lu toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi lu toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi lu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.