Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tang van c1 snippets" » "dang van c1 snippets", "hoang van c1 snippets", "trong van c1 snippets", "tang van ca snippets", "tang van co snippets", "tang van cu 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: (((("tang van c1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang van c1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang van c1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang van c1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.