Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vao luong do snippets" » "van luong do snippets", "cao luong do snippets", "do luong do snippets", "vao luong dao snippets", "vao cuong do snippets", "vao luong du 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: (((("vao luong 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: (((("vao luong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vao luong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vao luong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.