Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham vao son snippets" » "cham va son snippets", "pham van son snippets", "chat va son snippets", "cham van son snippets", "cham cao son snippets", "cham tao son 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: (((("cham vao son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cham vao son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham vao son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham vao son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.