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