SLD Geoserver - Point show all labels

show_all_label.sld

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0" xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd" xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <NamedLayer>
        <Name>Point show all labels</Name>
        <UserStyle>
            <Title>Chingchai: Point show all labels</Title>
            <FeatureTypeStyle>
                <Rule>
                    <PointSymbolizer>
                        <Graphic>
                            <Mark>
                                <WellKnownName>circle</WellKnownName>
                                <Fill>
                                    <CssParameter name="fill">#FF0000</CssParameter>
                                </Fill>
                            </Mark>
                            <Size>6</Size>
                        </Graphic>
                    </PointSymbolizer>
                    <TextSymbolizer>
                        <Label>
                            <ogc:PropertyName>vill_nam_t</ogc:PropertyName>
                        </Label>
                        <Font>
                            <CssParameter name="font-family">tahoma</CssParameter>
                            <CssParameter name="font-size">8</CssParameter>
                            <CssParameter name="font-style">normal</CssParameter>
                            <CssParameter name="font-weight">bold</CssParameter>
                        </Font>
                        <LabelPlacement>
                            <PointPlacement></PointPlacement>
                        </LabelPlacement>
                        <VendorOption name="maxDisplacement">10</VendorOption>
                        <VendorOption name="labelAllGroup">true</VendorOption>
                        <VendorOption name="goodnessOfFit">0.3</VendorOption>
                        <VendorOption name="spaceAround">0</VendorOption>
                    </TextSymbolizer>
                </Rule>
            </FeatureTypeStyle>
        </UserStyle>
    </NamedLayer>
</StyledLayerDescriptor>