Perhaps you should try some spelling variations:
"han cao cong snippets" » "han cao code snippets", "han cac cong snippets", "han cao dang snippets", "han cua cong snippets", "han cho cong snippets", "han gao cong snippets", "hoang cao cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

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 ("han cao cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("han cao cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( han cao cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("han cao cong snippets"))) or ("locating bug core snippets"))*.