Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua nhan can snippets" » "ca nhan can snippets", "cua ngan can snippets", "cua nha can snippets", "cua nhan chan snippets", "cua nhan dan snippets", "cua nhan van 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: (((("cua nhan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua nhan can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua nhan can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua nhan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.