Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tang hoc voi snippets" » "nang hoc voi snippets", "tang ho voi snippets", "bang hoc voi snippets", "tang hoc vi snippets", "tang hoc vo snippets", "tang hoc noi 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 hoc voi 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 hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.