Perhaps you should try some spelling variations:
"thi che hoat snippets" » "thi che code snippets", "thi che khoa snippets", "thi cao hoat snippets", "thi co hoat snippets", "tai che hoat snippets", "thi chien hoat snippets", "thi chieu hoat 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 ("thi che hoat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("thi che hoat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( thi che hoat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("thi che hoat snippets"))) or ("locating bug core snippets"))*.