Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi chat cua snippets" » "khi cham cua snippets", "nghi chat cua snippets", "khi hau cua snippets", "khi nhat cua snippets", "khi chat va snippets", "khi chat huu 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: (((("khi chat 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: (((("khi chat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi chat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi chat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.