Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc danh do snippets" » "quoc khanh do snippets", "cuon danh do snippets", "hoc danh do snippets", "quoc dang do snippets", "quoc danh co snippets", "quoc danh di 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: (((("quoc danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc danh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc danh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.