Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc bien do snippets" » "duoc dien do snippets", "duc bien do snippets", "duoc thien do snippets", "duoc bien doi snippets", "duoc bien so 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 bien 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: (((("duoc bien do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc bien do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc bien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.