Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"le tang hoe snippets" » "le tang ho snippets", "le tang hieu snippets", "le tong hop snippets", "le quang hoe snippets", "le trung hoe snippets", "le thanh hoe 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: (((("le tang hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("le tang hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( le tang hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("le tang hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.