Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc quy cua snippets" » "hoc quan cua snippets", "hoc quoc cua snippets", "hoc duy cua snippets", "hoc quy chuan snippets", "hoc quyen cua 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: (((("hoc quy cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc quy cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc quy cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc quy cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.