Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran viet cu snippets" » "trien viet cu snippets", "gian viet cu snippets", "san viet cu snippets", "tran viet cau snippets", "tran viet chu snippets", "tran viet co 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: (((("tran viet cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran viet cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran viet cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran viet cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.