Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham voi vo snippets" » "cham hoi vo snippets", "pham voi vo snippets", "cham soc vo snippets", "cham voi ho snippets", "cham voi o 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 voi vo 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 voi vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham voi vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham voi vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.