Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"toc hieu cua snippets" » "toc hieu code snippets", "toc thieu cua snippets", "doc hieu cua snippets", "hoc thieu cua snippets", "toc hieu qua snippets", "toc dieu cua snippets", "toc bieu 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: (((("toc hieu 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: (((("toc hieu cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc hieu cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc hieu cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.