Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chap mat cua snippets" » "chap dat cua snippets", "cham mat cua snippets", "chop mat cua snippets", "chap ma cua snippets", "chap manh cua snippets", "chap mang cua 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: (((("chap mat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chap mat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chap mat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap mat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.