Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc vai cac snippets" » "ngoc hai cac snippets", "ngoc ai cac snippets", "ngo van cac snippets", "ngoc va cac snippets", "ngoc tai 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 vai 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 vai cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc vai cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc vai cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.