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