Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sang vi cua snippets" » "hang vi cua snippets", "sang va cua snippets", "sang bi cua snippets", "sang vai cua snippets", "sang di 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: (((("sang vi 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: (((("sang vi cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sang vi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sang vi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.