Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc chat o2 snippets" » "doc chat o2 snippets", "duoc pham o2 snippets", "hoc chat o2 snippets", "duoc chat hoa snippets", "duoc chat hoc snippets", "duoc chat doc 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: (((("duoc chat 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: (((("duoc chat o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc chat o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc chat o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.