Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi phat hoc snippets" » "dai phat hoc snippets", "dao phat hoc snippets", "hoc phat hoc snippets", "doi phap hoc snippets", "doi phau hoc snippets", "doi chat hoc 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: (((("doi phat hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi phat hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi phat hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi phat hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.