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