Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van linh dh snippets" » "van minh dh snippets", "van dinh dh snippets", "van binh dh snippets", "van sinh dh snippets", "van linh chi snippets", "van linh phi 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: (((("van linh dh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van linh dh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van linh dh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van linh dh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.