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