Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu van cho snippets" » "thuc van cho snippets", "thuy van cho snippets", "tu van cho snippets", "thu van chi snippets", "thu san cho snippets", "thu van chat 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: (((("thu van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu van cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu van cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.