Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu cau so snippets" » "ngu ca so snippets", "nhu cau so snippets", "ngu cu so snippets", "ngu cau do snippets", "ngu cau o snippets", "ngu cao 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: (((("ngu cau 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: (((("ngu cau so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu cau so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu cau so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.