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