Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao cho so snippets" » "cao cho so snippets", "dac cho so snippets", "dao ho so snippets", "dao cho son snippets", "dao co 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 cho 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 cho so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao cho so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao cho so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.