Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoat tinh o2 snippets" » "hoa tinh o2 snippets", "ha tinh o2 snippets", "hoi tinh o2 snippets", "hoat tinh hoc snippets", "hoat tinh son snippets", "hoat tinh hoa 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: (((("hoat tinh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoat tinh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoat tinh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoat tinh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.