Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con vinh cuu snippets" » "cong vinh cuu snippets", "son vinh cuu snippets", "coi vinh cuu snippets", "con dinh cuu snippets", "con sinh cua snippets", "con dinh cu 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: (((("con vinh 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: (((("con vinh cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con vinh cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con vinh cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.