Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc hoi cac snippets" » "ngoc hai cac snippets", "ngoc hoa cac snippets", "ngoai hoi cac snippets", "ngoc hoc cac snippets", "ngoc voi cac 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 hoi cac 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 hoi cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc hoi cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc hoi cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.