Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"kinh hoc php snippets" » "sinh hoc php snippets", "hinh hoc php snippets", "tinh hoc php snippets", "kinh hoc phap snippets", "kinh hoc pho snippets", "kinh hoc phe 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: (((("kinh hoc php snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kinh hoc php snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( kinh hoc php snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kinh hoc php snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.