Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"rap du hoc snippets" » "lap du hoc snippets", "gap du hoc snippets", "tap du hoc snippets", "rap tu hoc snippets", "rap duoc 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: (((("rap du 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: (((("rap du hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( rap du hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("rap du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.