Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets"
"dap van toan snippets" » "dap van tuan snippets", "dap van tan snippets", "dap van thanh snippets", "dao van toan snippets", "tap van toan snippets", "dam van toan 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: (((("dap van toan snippets") or ("python using sat snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dap van toan snippets") OR ("python using sat snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dap van toan snippets ) or ( python using sat snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dap van toan snippets") or ("python using sat snippets"))) or ("locating bugs code snippets"))*.