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