Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho van toi snippets" » "chao van toi snippets", "chon van toi snippets", "cho vay toi snippets", "cho van tai snippets", "cho van thi snippets", "cho 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: (((("cho 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: (((("cho van toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho van toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.