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