Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc thanh vo snippets" » "duoc thanh vo snippets", "hoc thanh vo snippets", "duc thanh vo snippets", "doc thanh va snippets", "doc thanh ve snippets", "doc than vo 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: (((("doc thanh vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc thanh vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc thanh vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc thanh vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.