Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den coi cua snippets" » "den voi cua snippets", "den cong cua snippets", "den cuoi cua snippets", "den hoi cua snippets", "den doi 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: (((("den coi 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: (((("den coi cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den coi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den coi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.