Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhung lan ve snippets" » "nhung lang ve snippets", "nhung van ve snippets", "phuong lan ve snippets", "nhung luan ve snippets", "nhung ban ve snippets", "nhung dan ve 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: (((("nhung lan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung lan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung lan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung lan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.