Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc viet cua snippets" » "hoc viet cua snippets", "thuc viet cua snippets", "ngoc viet cua snippets", "toc viec cua snippets", "toc viet ca snippets", "toc viet qua 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: (((("toc viet cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc viet cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc viet cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc viet cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.