Perhaps you should try some spelling variations:
"dat thu cham snippets" » "dat thu code snippets", "dat thi cham snippets", "dat tu cham snippets", "dat thu pham snippets", "dat phu cham snippets", "sat thuc cham snippets", "dat tieu cham snippets"
"locating bug core snippets" » "locating bug code 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: (((("python using java snippets") or ("dat thu cham snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dat thu cham snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( dat thu cham snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("dat thu cham snippets"))) or ("locating bug core snippets"))*.