Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac trong vo snippets" » "cay trong vo snippets", "hoc trong vo snippets", "tac trong va snippets", "tac trong co snippets", "tac tuong 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: (((("tac trong 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: (((("tac trong vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac trong vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac trong vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.