Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den gen cua snippets" » "den nen cua snippets", "den dien cua snippets", "den hien cua snippets", "den gian cua snippets", "den menh cua snippets", "den benh 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 gen 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 gen cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den gen cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den gen cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.