Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc dua moi snippets" » "doc cua moi snippets", "hoc dua moi snippets", "duc duat moi snippets", "doc dua voi snippets", "doc vua moi 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: (((("doc dua moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc dua moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc dua moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc dua moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.