Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi xuan cac snippets" » "thi xa cac snippets", "thi lan cac snippets", "thi xuan can snippets", "thi xuat cac snippets", "thi 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: (((("thi 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: (((("thi xuan cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi xuan cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi xuan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.