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