Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hanh kiem o2 snippets" » "khanh kiem o2 snippets", "hanh kem o2 snippets", "anh kiem o2 snippets", "hanh kiem mon snippets", "hanh kiem mot 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: (((("hanh kiem o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh kiem o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh kiem o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh kiem o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.