Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham voi can snippets" » "cham voi can snippets", "pham voi can snippets", "than voi can snippets", "tham voi cac snippets", "tham voi cong snippets", "tham voi hang 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: (((("tham voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tham voi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.