Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran ngoc so snippets" » "tran quoc so snippets", "tran ngoc son snippets", "tran ngoc sy snippets", "tran nuoc so 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 ngoc so 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 ngoc so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran ngoc so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran ngoc so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.