Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khanh van bo snippets" » "thanh van bo snippets", "khanh vinh bo snippets", "hanh va bo snippets", "khanh van bao snippets", "khanh van bon snippets", "khanh can bo 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: (((("khanh van bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khanh van bo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh van bo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh van bo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.