Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hen hoc voi snippets" » "hen ho voi snippets", "den hoc voi snippets", "khien hoc voi snippets", "hen hoc vi snippets", "hen hoc vo snippets", "hen hoc noi 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: (((("hen hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hen hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hen hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hen hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.