Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan lan bo snippets" » "ngan han bo snippets", "ngan van bo snippets", "ngan can bo snippets", "ngan ban bo snippets", "ngan lan o 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 lan bo 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 lan bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan lan bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan lan bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.