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