Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac vang hee snippets" » "cac van hee snippets", "tac dung hee snippets", "tac dong hee snippets", "tac vang de snippets", "tac bang he snippets", "tac nang he 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 vang hee 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 vang hee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac vang hee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac vang hee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.