Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat ket doan snippets" » "hat ket hoa snippets", "hat le doan snippets", "hat ket van snippets", "hat ke doan snippets", "phap ket doan snippets", "hoat keo doan 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: (((("hat ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat ket doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat ket doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat ket doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.