Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi hoach do snippets" » "thu hoach do snippets", "thi hanh do snippets", "thi hoa do snippets", "thi hoach de snippets", "thi hoach du snippets", "thi hoach hoi 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: (((("thi hoach 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: (((("thi hoach do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi hoach do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi hoach do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.