Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc si he snippets" » "duoc si he snippets", "quoc so he snippets", "quoc su he snippets", "quoc si hue snippets", "quoc gi 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: (((("quoc si he 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 si he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc si he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc si he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.