Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac viet cua snippets" » "bac viet cua snippets", "toc viet cua snippets", "tuc viet cua snippets", "tac viec cua snippets", "tac viet ca snippets", "tac 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: (((("tac 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: (((("tac viet cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac viet cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac viet cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.