Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lang van cua snippets" » "dang van cua snippets", "tang van cua snippets", "hoang van cua snippets", "lang vang cua snippets", "lang ban cua snippets", "lang dan cua 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: (((("lang van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lang van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lang van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lang van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.