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