Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den tu cua snippets" » "dien tu cua snippets", "dan tu cua snippets", "den su cua snippets", "den hu cua snippets", "den vu 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 tu 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 tu cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den tu cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den tu cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.