Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc song o2 snippets" » "cuoc song o2 snippets", "duoc dong o2 snippets", "nuoc song o2 snippets", "duoc song con snippets", "duoc song don snippets", "duoc song toi 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: (((("duoc song o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc song o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc song o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc song o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.