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