Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc ka so snippets" » "ngoc ha so snippets", "ngoc hai so snippets", "ngoc hoa so snippets", "ngoc ma so snippets", "ngoc va so 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: (((("ngoc ka so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc ka so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc ka so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc ka so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.