Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"when dan hoc snippets" » "when can hoc snippets", "phen dang hoc snippets", "nhan dan hoc snippets", "when van hoc snippets", "when dan toc snippets", "when dai 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: (((("when dan 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: (((("when dan hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( when dan hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("when dan hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.