Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham khai con snippets" » "tham khao con snippets", "pham khac con snippets", "than khai con snippets", "ham hai con snippets", "ham khi con snippets", "ham phai con 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: (((("ham khai con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ham khai con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham khai con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham khai con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.