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