Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc nhanh di snippets" » "hoc nganh di snippets", "hoc phan di snippets", "hoc nhanh vi snippets", "hoc nhanh li snippets", "hoc nhanh dien 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 nhanh di 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 nhanh di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc nhanh di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc nhanh di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.