Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc kham cuu snippets" » "duoc kham cuu snippets", "duc pham cuu snippets", "duc tham cuu snippets", "duc cham cuu snippets", "duc khao cuu snippets", "duc kham chua 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: (((("duc kham cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc kham cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc kham cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc kham cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.