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