Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan ngoc que snippets" » "dang ngoc que snippets", "doan ngoc que snippets", "van ngoc que snippets", "dan ngoc hue snippets", "dan ngoc quy snippets", "dan ngoc quyen 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: (((("dan ngoc que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan ngoc que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan ngoc que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan ngoc que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.