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