Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan tao den snippets" » "nhan tai den snippets", "nhan dan den snippets", "nhan va den snippets", "nhan tao nen snippets", "nhan dao den snippets", "nhan tac den 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: (((("nhan tao den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan tao den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan tao den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan tao den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.