Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day minh de snippets" » "dao minh de snippets", "day manh de snippets", "dan minh de snippets", "day minh ve snippets", "day sinh de snippets", "day menh de 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: (((("day minh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("day minh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day minh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day minh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.