Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac dan toi snippets" » "tac danh toi snippets", "cac dan toi snippets", "tac da toi snippets", "tac dan toc snippets", "tac dan thi snippets", "tac van toi 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: (((("tac dan 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: (((("tac dan toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac dan toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac dan toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.