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