Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"biet voi hoc snippets" » "biet noi hoc snippets", "viet voi hoc snippets", "bien doi hoc snippets", "biet hoi hoc snippets", "biet vi hoc snippets", "biet voi ho 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: (((("biet voi 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: (((("biet voi hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( biet voi hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("biet voi hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.