Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc tinh di snippets" » "hoc trinh di snippets", "hoc sinh di snippets", "hoc kinh di snippets", "hoc tinh doi snippets", "hoc tinh da 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 tinh 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 tinh di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc tinh di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc tinh di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.