Query tuning from view in SQL Server 2008

ALTER VIEW dbo.vw_AllJobsWithRecruiter
AS
SELECT	TOP(SELECT COUNT(iJobID_PK) FROM dbo.tbUS_Jobs)
         iJobId_PK  AS	JobId,
         dbo.ufn_JobStatus(iJobId_PK) AS JobStatus,
         dbo.ufn_RecruiterCompanyName(iJobId_PK) AS CompanyName,
         sOther AS  OtherCompanyName
FROM	 dbo.tbUS_Jobs
WHERE	 bDraft = 0
ORDER BY dtPostedDate DESC

SELECT * FROM vw_AllJobsWithRecruiter
WHERE  OtherCompanyName LIKE '%Microsoft INC%'

SELECT * FROM vw_AllJobsWithRecruiter
WHERE CompanyName LIKE '%Microsoft INC%' OR OtherCompanyName LIKE '%Microsoft INC%'

CREATE Function [dbo].[ufn_RecruiterCompanyName] (@JobId bigint)
RETURNS nvarchar(200)
AS
BEGIN
 DECLARE @ResultVar nvarchar(200)
 DECLARE @RecruiterId bigint
 select @RecruiterId = iRecruiterId_FK from dbo.tbUS_Jobs     with (Nolock)
 where iJobId_PK = @JobId;
 Select @ResultVar = sCompanyName from dbo.tbUS_RecruiterCompanyInfo     with (Nolock)
 where iRecruiterId_FK = dbo.ufn_GetParentRecruiterID(@RecruiterId)
 return isnull(@ResultVar,'')
END

CREATE Function [dbo].[ufn_GetParentRecruiterID](@RecruiterId bigint)
returns bigint
as
begin
declare @ParentRecruiterId bigint
SELECT @ParentRecruiterId = iParentId FROM dbo.tbUS_Recruiter with (Nolock)
WHERE iRecruiterId_PK = @RecruiterId
IF(@ParentRecruiterId = 0)
 SET @ParentRecruiterId = @RecruiterId
RETURN @ParentRecruiterId
end