Exact Phrase match and proper result shows in highlight is not working ?

1) Highlight from top of the document - currently it shows randomly document
2) Exact match as similar in phrase
3) not highlight relevant words like If I search "Top company" then it will highlight exact match "Top company" instead of "Top" of the brand "company"

Request of Post Api
{
"search": "\"Top company\"",
"count": true,
"skip": 0,
"top": 100,
"highlight": "content-1000",
"filter": "contractId ne 15785",
"queryType": "full",
"searchMode": "all",
"scoringProfile": "exactFirst",
"highlightPreTag": "<strong>",
"highlightPostTag": "</strong>"
}