.search-form-kienthuc, .input-date{
    width: 100%;
    margin: 30px auto;
    text-align: center;
    color: #fff;
    position: relative;
    -webkit-box-shadow: 0px 3px 10px 1px rgba(0,0,0,0.2);
            box-shadow: 0px 3px 10px 1px rgba(0,0,0,0.2);
    border-radius: 5px;
}
.search-form-kienthuc form{
    width: 100%;
} 
.search-form-kienthuc form button{
    position: absolute;
    border: none;
    outline: none;
    -webkit-box-shadow: none;
            box-shadow: none;
    background: none;
    padding: 10px;
}
.search-form-kienthuc form button img{
    width: 15px;
}
.search-form-kienthuc form input{
    width: 100%;
    padding:10px 200px 10px 50px;
    border-radius: 5px;
    outline: none;
    -webkit-box-shadow: none;
            box-shadow: none;
    border: none;
}
.search-form-kienthuc select {
    position: absolute;
    border: none;
    outline: none;
    -webkit-box-shadow: none;
            box-shadow: none;
    background: none;
    border-radius:0px 5px 5px 0px;
    padding: 11px;
    margin-right: 10px;
    border:none;
    right: 0;
    top: 0;
    color: #545A62;
    width: 200px;
}
.search-form-kienthuc select::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 10px;
    height:10px;
    color: red;
    background: red;
    padding: 1px;
}
.input-date img{
    width: 24px;
    position: absolute;
    top: 0;
    right: 0;
}
.input-date >div{
    width: 48%;
    display: inline-block;
    position: relative;
}
.input-date{
    background: #fff;
    padding: 10px 0px;
}
.input-date input{
    width: 100%;
    display: inline-block;
    margin: 0;
    outline: none;
    -webkit-box-shadow: none;
            box-shadow: none;
    border: none;
    padding-right: 15px;
}
.input-date .start{
    border-right: 2px solid rgba(0,0,0,0.1);
}


@media only screen and (max-width: 767px){
.search-form-kienthuc form input{
    padding-right: 130px;
}
.search-form-kienthuc select{
    width: 130px;
}
.search-form-kienthuc form input::-webkit-input-placeholder{
    font-size: 12px;
}
.search-form-kienthuc form input::-moz-placeholder{
    font-size: 12px;
}
.search-form-kienthuc form input:-ms-input-placeholder{
    font-size: 12px;
}
.search-form-kienthuc form input::-ms-input-placeholder{
    font-size: 12px;
}
.search-form-kienthuc form input::placeholder{
    font-size: 12px;
}
}