Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao tuong so snippets" » "dai tuong so snippets", "dao cuong so snippets", "dao trong so snippets", "dao tuong ho snippets", "dao truong son snippets", "dao cong 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: (((("dao tuong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao tuong so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao tuong so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao tuong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.