Perhaps you should try some spelling variations:
"tao cuu hoan snippets" » "tao cuu code snippets", "tao luu hoang snippets", "tao cuu van snippets", "tao cuu khoa snippets", "tao cu hoan snippets", "tao cau hoan snippets", "khao cuu hoan 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 ("tao cuu hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("tao cuu hoan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( tao cuu hoan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("tao cuu hoan snippets"))) or ("locating bug core snippets"))*.