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