Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen cuong do snippets" » "nen cong do snippets", "kien cuong do snippets", "nen thuong do snippets", "nen cuong dao snippets", "nen cuong vo snippets", "nen luong do 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: (((("nen cuong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen cuong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen cuong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen cuong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.