Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach van toi snippets" » "cac van toi snippets", "bach van toi snippets", "canh van toi snippets", "cach van tai snippets", "cach van thi snippets", "cach van toan 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: (((("cach van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cach van toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach van toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.